96 cobra surges of power - Mustang Evolution

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Old 09-08-2015, 08:07 AM   #1
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96 cobra surges of power

When i start my car after siting all night it turns over then revs up then dies over and over. I have to keep my foot in the gas to warm it up and the rpms will go up ans down at the same level i have the gas pressed. Once warm it idles really low and when i drive it its looses power ans gains power as i accelerate? New iac and maf all I can think is fuel injectors as they are still stock could this be it?
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Old 09-08-2015, 12:30 PM   #2
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That could very well be a vaccum leak in the intake tract. Do you know how to test for intake air leaks? iac and maf could also be factors, but make sure you don't have any leaks first.


Does your car still have the IMRCs in it? I hear those can cause related problems.
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Old 09-08-2015, 02:46 PM   #3
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Well if i spray crab cleaner under the intake while running it will idle up so its a intake leak? An that could cause the having to hold the pedal down to get it running. Once it warms up it idles but very low and loafing. Maybe the leak gap gets filled some when it warms up the gasket expands or something?
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Old 09-08-2015, 05:21 PM   #4
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Sounds like you found the problem 👍🏻


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Old 09-08-2015, 05:58 PM   #5
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Sounds like you found the problem 👍🏻


Sent from Rapinators trunk

So more thank likely its the intake .
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Old 09-09-2015, 03:46 PM   #6
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Careful with sucking in too much carb cleaner into the intake.
Hopefully you already have it resolved by now.
Reminds me to suggest, if you haven't already installed one, an air separator/filter inline with your PCV tubing lines is a good, good thing to have. ~I have a cheap Steeda unit but I'm waiting on UPR to sell their multi-tiered unit outright as a universal piece I can use in place of the one I got now.
Apologize For Rambling GOOD LUCK!
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Old 09-09-2015, 03:49 PM   #7
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Its going to the shop tonight to get the intake pulled and fix the leak i hope it solves the problem considering its not a cheap repair but nothing is with a cobra.
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Old 09-10-2015, 07:08 PM   #8
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Got her tore down gaskets were flat as a pancake. They sent a GT sohc gasket kit instead of COBRA kit should have replacement tomorrow then putting it back together!

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Old 09-11-2015, 11:41 PM   #9
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SORRY-
It would be an understatement to say Thai would of not been understanding or forgiving if a GT part was sent.
I am furious for you!
Whomever placed the order and the tech who diagnosed it would NEVER get within 100 feet of my Cobra. No appologogies, No paying for the correct part, and I would stand over the shoulder of the new tech making the repairs.
If you see any kind of other defeciencies appearant when repairs are being made again, they will replace it for free, after doing your homework, if you see a nut or bolt tightened to wrong specs, stop them & have them order new gaskets and bolts again due to unforgivable ignorance, distracted stupidity. When that head is pulled, I would demand proper intake cleaning, IMRC plate function inspection & cleaning, Every vacuum line inspected for cracks. And a 100% operation inspection of every devise atop of the engine.
NO EXCUSE TO DELIVER ANOTHER CARS PARTS. None!
Shame.
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Old 09-13-2015, 07:47 AM   #10
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It was the parts stores in town there computers said the gt and cobra has the same gaskets my shop just ended up going and looking at it and getting it himself. Monday it should be done! People at the parts stores dont have to have any knowledge to work there!

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Old 09-16-2015, 01:23 AM   #11
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GREAT!
Can't wait for you to be
E back on the road again!
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Old 09-16-2015, 11:30 AM   #12
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All back together and still will not run until it is warmed up and idles rough what is next ? It already has a IAC valve and MAF.

---------- Post added at 11:30 AM ---------- Previous post was at 11:30 AM ----------

All back together and still will not run until it is warmed up and idles rough what is next ? It already has a IAC valve and MAF.
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Old 09-16-2015, 12:39 PM   #13
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That sucks, no check engine light? Did you check for vaccum leaks after the gaskets were replaced? Can you get your hands on a OBD II scanner, that may be the best bet to help track down the issue!
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Old 09-16-2015, 12:54 PM   #14
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No intake leaks anymore

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Old 09-18-2015, 01:45 AM   #15
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Last time I've had these symptoms was when my coil packs were failing, also when I had a bad electrical connection to ground, MAF sensor and intake with loose connections too.
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Old 09-18-2015, 07:56 AM   #16
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Originally Posted by carnellrules3 View Post
It was the parts stores in town there computers said the gt and cobra has the same gaskets my shop just ended up going and looking at it and getting it himself. Monday it should be done! People at the parts stores dont have to have any knowledge to work there!

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No we sure don't


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Old 09-18-2015, 10:04 AM   #17
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Originally Posted by robb15033 View Post
SORRY-
It would be an understatement to say Thai would of not been understanding or forgiving if a GT part was sent.
I am furious for you!
Whomever placed the order and the tech who diagnosed it would NEVER get within 100 feet of my Cobra. No appologogies, No paying for the correct part, and I would stand over the shoulder of the new tech making the repairs.
If you see any kind of other defeciencies appearant when repairs are being made again, they will replace it for free, after doing your homework, if you see a nut or bolt tightened to wrong specs, stop them & have them order new gaskets and bolts again due to unforgivable ignorance, distracted stupidity. When that head is pulled, I would demand proper intake cleaning, IMRC plate function inspection & cleaning, Every vacuum line inspected for cracks. And a 100% operation inspection of every devise atop of the engine.
NO EXCUSE TO DELIVER ANOTHER CARS PARTS. None!
Shame.
Right, but make sure you're getting mad at the right guy first!! The Parts store worker that the mechanic ordered the part from (over the phone) probably didn't know his *** from a hole in the ground. 70% of them are clueless. A good chunk of the other 30% of them get annoyed at their ignorant coworkers and then leave within a few months of working there lol.


That's what happens when you only pay $9/hour to your employees. The good ones eventually figure it out and go somewhere that pays them what they're worth.
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Old 09-18-2015, 10:09 AM   #18
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Originally Posted by Panther140 View Post
Right, but make sure you're getting mad at the right guy first!! The Parts store worker that the mechanic ordered the part from (over the phone) probably didn't know his *** from a hole in the ground. 70% of them are clueless. A good chunk of the other 30% of them get annoyed at their ignorant coworkers and then leave within a few months of working there lol.


That's what happens when you only pay $9/hour to your employees. The good ones eventually figure it out and go somewhere that pays them what they're worth.
That is very true. But also at our end, we also deal with mechanics that don't have a clue either. Not a lot, but enough to see it daily. I've sent out so many wrong parts because they insist it's something for the passenger side, or its a mustang gt not a 3.8, etc etc. Then it gets returned and they get mad at me because it's the wrong part.
Then I get plenty who want something like a brake booster, and I ask is it the base model or 3.8? And they tell me it doesn't matter.

God I love my job. Lol

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 09-18-2015, 10:15 AM   #19
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I got a funny story from when I visited a parts store 2 days ago.


I was looking for some mufflers-- Cashier starts looking through their system for some mufflers-- He pulls up a listing for "hooker headers" listed under mufflers-- has a picture of actual LT headers in the ad. -- Part number is 2150-3HKR-- $81(ish)


Keep in mind, the part number for the black aerochamber mufflers is 21503hkr. 2150-3hkr is headers. 21503hkr is aerochamber mufflers.


The final order was for "2150-3hkr hooker headers". total came to $81. I am going there today after work to see if they shipped a set of headers, or if they shipped (one) muffler haha
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Old 09-18-2015, 10:21 AM   #20
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If it's 81 ish, it's gonna be the muffler. If I looked up the number with or without a dash, it would usually prompt a screen that has me pick from different bar codes that share the same (similar) part numbers. For example I typed in a part number for some adhesive, and it brought up an engine head as an option. But if he ordered the 81 dollar part, unless someone at the warehouse messes up, (those guys took pride in their organization) then it will be the right bar code.

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 09-18-2015, 10:23 AM   #21
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Sometimes the descriptions get confusing tho. I got excited when I thought I could get upper and lower lakewood rear control arms for like 180 bucks with my discount. Upon further observation, I found out it was lowers only.

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 09-18-2015, 10:24 AM   #22
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That is very true. But also at our end, we also deal with mechanics that don't have a clue either. Not a lot, but enough to see it daily. I've sent out so many wrong parts because they insist it's something for the passenger side, or its a mustang gt not a 3.8, etc etc. Then it gets returned and they get mad at me because it's the wrong part.
Then I get plenty who want something like a brake booster, and I ask is it the base model or 3.8? And they tell me it doesn't matter.

God I love my job. Lol

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Yeah I'm painfully aware of that as well lol. I worked at a parts store for a while. We had some pretty ignorant and demanding customers, but we had a lot of smart ones as well.

Part of why parts store workers get the blunt of a lot of criticism is because they get exposed to like 200 different fricken parts a day.

Some dude will come in like:
"hey do you have a thingymabob that goes on this one smog tube for my 1973.5 fiat Gianini? Yeah its an aftermarket part and I don't know what its called"

Me: "uhm-- I don't think that's something we can get for you but Ill try to dig something up to help you out"

Some dude: "damn auto parts store guy u dosnt no enyfing about cars u idiot. I h8 u let me talk to ur manidger"

Me: nice fiat...
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Old 09-18-2015, 10:28 AM   #23
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Lols yes. Exactly. I had a guy get mad at me because I didn't know what oil his generator takes. I asked if he had his owners manual and of course he said no. Just figures I have a degree in **** he owns.

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 09-18-2015, 10:33 AM   #24
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^ Shoulda sold him gear lube lol
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Old 09-18-2015, 10:38 AM   #25
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I was new at the time. But If I could go back, I would give him a long winded story about how I was the lead designer of that generator, and I must be a moron for forgetting what oil I decided should go in it.

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2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.
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Old 09-18-2015, 12:56 PM   #26
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Quote:
Originally Posted by robb15033 View Post
SORRY-
It would be an understatement to say Thai would of not been understanding or forgiving if a GT part was sent.
I am furious for you!
Whomever placed the order and the tech who diagnosed it would NEVER get within 100 feet of my Cobra. No appologogies, No paying for the correct part, and I would stand over the shoulder of the new tech making the repairs.
If you see any kind of other defeciencies appearant when repairs are being made again, they will replace it for free, after doing your homework, if you see a nut or bolt tightened to wrong specs, stop them & have them order new gaskets and bolts again due to unforgivable ignorance, distracted stupidity. When that head is pulled, I would demand proper intake cleaning, IMRC plate function inspection & cleaning, Every vacuum line inspected for cracks. And a 100% operation inspection of every devise atop of the engine.
NO EXCUSE TO DELIVER ANOTHER CARS PARTS. None!
Shame.

A SIMPLE MISTAKE BY PARTS MAN POSSIABLE,VENDOR MISTAKE.
I WOULD THROW YOU AND YOUR CAR OUT OF MY SHOP IF YOU ACTED LIKE YOU ADVISE OP TO DO! ITS OVIOUS YOU HAVE NO CLUE ABOUT REPAIRS
. BEST THING FOR YOU TO DO IS DO ALL YOUR REPAIRS YOURSELF. ITS CLEAR NO TECT COULD PLEASE YOU. GROW UP AND SMELL THE ROSES IN OTHER WORDS CHILL OUT.

THIS IS HOW I RAN MY 10 BAY SHOP TILL I RETIRED,WE HAD MORE WORK THAN WE COULD DO AND ABOUT A THREE WEEK WAIT TO GET IN.
.
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Old 09-18-2015, 01:03 PM   #27
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Question

Quote:
Originally Posted by robb15033 View Post
SORRY-
It would be an understatement to say Thai would of not been understanding or forgiving if a GT part was sent.
I am furious for you!
Whomever placed the order and the tech who diagnosed it would NEVER get within 100 feet of my Cobra. No appologogies, No paying for the correct part, and I would stand over the shoulder of the new tech making the repairs.
If you see any kind of other defeciencies appearant when repairs are being made again, they will replace it for free, after doing your homework, if you see a nut or bolt tightened to wrong specs, stop them & have them order new gaskets and bolts again due to unforgivable ignorance, distracted stupidity. When that head is pulled, I would demand proper intake cleaning, IMRC plate function inspection & cleaning, Every vacuum line inspected for cracks. And a 100% operation inspection of every devise atop of the engine.
NO EXCUSE TO DELIVER ANOTHER CARS PARTS. None!
Shame.

DUDE YOUR SHOWING YOUR KNOWLEDGE OF CAR ENGINES. WHO TOLD YOU THAT TO REPLACE INTAKE GASKETS YOU HAD TO PULL HEADS? REALLY?
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Old 09-18-2015, 01:08 PM   #28
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all back together and still will not run until it is warmed up and idles rough what is next ? It already has a iac valve and maf.

---------- post added at 11:30 am ---------- previous post was at 11:30 am ----------

all back together and still will not run until it is warmed up and idles rough what is next ? It already has a iac valve and maf.
any codes? You did re-train pcm after replacing iac,? What do you have base idle set to?whats fuel pressure? Should have a code
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Old 09-18-2015, 09:26 PM   #29
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I was in a parts store last week looking at the detailing products. While talking to him about what I like to use and didn't. I asked him what he uses to protect his cars paint and he said " I've always used Armor-All on my car, works great"
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Old 09-28-2015, 11:56 AM   #30
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I was in a parts store last week looking at the detailing products. While talking to him about what I like to use and didn't. I asked him what he uses to protect his cars paint and he said " I've always used Armor-All on my car, works great"
he learned that at wyotech
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Old 09-28-2015, 12:13 PM   #31
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any codes? You did re-train pcm after replacing iac,? What do you have base idle set to?whats fuel pressure? Should have a code
Yes and the idel is controled by the computer. The fuel pressure is perfect.

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