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Old 08-13-2014, 07:35 PM   #1
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Car still stalls. Need advise

Ok so changed the cylinder 6 cop. Car is running better. Still has high idle at start. Then lowers after a few seconds I drove it harder today. Doing 55 then slammed I the brakes. Did this 5 or six times. Stalled once. Any suggestions.


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Old 08-13-2014, 07:43 PM   #2
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Do you remember what brand of IAC that you bought from Rockauto?
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Old 08-13-2014, 07:51 PM   #3
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I got the iac from autozone.


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Old 08-13-2014, 07:57 PM   #4
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I got the iac from autozone.


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That's most likely the problem. Take it back and get either a Motorcraft or a Hitachi.
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Old 08-13-2014, 08:42 PM   #5
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all of are cars rev high for a couple mins when you first start it up then it drops down to normal idle and that's when I drive away.
Whats it hang at before dropping down to normal idle?
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Old 08-13-2014, 08:50 PM   #6
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if your car only stalls when your booting down the road and go from 60mph to 0 then your fine, if you have an auto tranny think of it as having a standard in 5th and slamming on the brakes to a dead stop, of course your cars going to stall out.
could be as simple as a loose battery connection or ground
but yah sounds like your fine.
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Old 08-13-2014, 08:51 PM   #7
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What was the original issue that you were having? And why did you change out the COP at cyl. 6 only? And when you say high idle at start up, what rpm are you talking about? Also, I am assuming since you are short and words missing from your statement that you were driving and slammed on the brakes a few times and you stalled once, is that the jest of it? Why where you doing that and what was your expectations by doing that? I think I am missing something here or something. All info would be helpful so to give the best advice possible. Thanks
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Old 08-13-2014, 08:52 PM   #8
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It shouldn't be stalling though...
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Old 08-13-2014, 08:53 PM   #9
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What was the original issue that you were having? And why did you change out the COP at cyl. 6 only? And when you say high idle at start up, what rpm are you talking about? Also, I am assuming since you are short and words missing from your statement that you were driving and slammed on the brakes a few times and you stalled once, is that the jest of it? Why where you doing that and what was your expectations by doing that? I think I am missing something here or something. All info would be helpful so to give the best advice possible. Thanks
Search Rollo's threads... It's all there.
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Old 08-13-2014, 09:13 PM   #10
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Quote:
Originally Posted by straybullitt View Post
Search Rollo's threads... It's all there.
I figured that, multiple threads on the same issue. I will take a look.
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Old 08-13-2014, 09:44 PM   #11
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It just dosnt feel right. When I went to the store and went in reverse. The rpms started to jump around from about 1 k to 500. That dosnt happen. Since I changed the cop it dose drive better. I found a guy that lives near me that had a mustang junk yard. If I née other parts I might go to him to save money. I know it's been a pain. And I keep asking the same thing over and over. Sorry everyone.


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Old 08-13-2014, 09:46 PM   #12
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Stray bullet I want to say it was motor craft.


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Old 08-13-2014, 09:47 PM   #13
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Thanks stray bullet. At least I know the stalling wen stopping is ok. I just hope I don't stall anymore going slow. It use to do that too. Lol.


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Old 08-13-2014, 10:06 PM   #14
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Haha.
I said that it should not stall.
It's highly doubtful that you went into AutoZone and asked for a IAC and they gave you a Motorcraft. They would have to order it probably. And they always hit you with "Why would you want to pay extra for a Motorcraft, ours has a lifetime guarantee? If it ever breaks, just bring it back and we'll give you a new one".... Over and over and over again.

There have been a LOT of recent threads about bad AutoZone IAC's.
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Old 08-13-2014, 10:25 PM   #15
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Well the first one I it was autozone. Lifetime. It broke. So when I returned it they didn't have it anymore. All they had was the other one. So I got that one instead.


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Old 08-13-2014, 10:49 PM   #16
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check your fuel pressure
No Fuel, No Spark, No Air car will stall
Check your spark plugs, air filter, fuel filter get the proper IAC
Clean your MAF, check your battery and your battery connections
check your alternator. Check for vacuum and exhaust leaks. could be
a faulty tps. Could be more then one coil that was going bad. and while your in there just pull the pcv valve and give it a shake make sure its not all gummed up.

My guess was the coil because the code u got said misfire cyl 6
and with a bad cop your car will idle erratically and want to stall out.
and as I said, I could be wrong but breaking from 60mph to dead stop hard does have the potential to stall the car out as your possibly beating the cars computer. From going from a high speed to a dead stop the transmission doesn't have time to disengage, and it causes the engine to stall. ( someone correct me if that's bull**** but I think im rite )
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Old 08-13-2014, 10:56 PM   #17
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I don't even know how to do that. Prob have to go to autozone see if they have a tester. What should it be at


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Old 08-13-2014, 11:26 PM   #18
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Ok turbo. I am going out to the ilex for 8 days. I will have to start doing that. Are there easy ways to test the sensors if they work. It will take time but u will check it all. Don't know if it was true but when I got the car the owner said he took it to a shop for the stalling and they changed the fuel filter. I looked at it. It looked bran new too. But I will start wither the spark plugs. The air filter is new and cleaned out the maf already. Thanks again.


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Old 08-13-2014, 11:46 PM   #19
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Sorry. Going to the field for 8 days.



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Old 08-13-2014, 11:49 PM   #20
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Quote:
Originally Posted by TurboCobra View Post
check your fuel pressure
No Fuel, No Spark, No Air car will stall
Check your spark plugs, air filter, fuel filter get the proper IAC
Clean your MAF, check your battery and your battery connections
check your alternator. Check for vacuum and exhaust leaks. could be
a faulty tps. Could be more then one coil that was going bad. and while your in there just pull the pcv valve and give it a shake make sure its not all gummed up.

My guess was the coil because the code u got said misfire cyl 6
and with a bad cop your car will idle erratically and want to stall out.
and as I said, I could be wrong but breaking from 60mph to dead stop hard does have the potential to stall the car out as your possibly beating the cars computer. From going from a high speed to a dead stop the transmission doesn't have time to disengage, and it causes the engine to stall. ( someone correct me if that's bull**** but I think im rite )
All good advice. The only thing that I'll add to that list is to remove the throttle body and clean it

The engine should NEVER stall if it's running correctly. It would be unacceptable for the factory to build a car that stalls only "sometimes" because it's very dangerous. If it happens at the wrong time you are screwed.
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Old 08-14-2014, 09:55 AM   #21
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Stray bullet Lucky for me it only stalls when I stop. At about 5 or less mph. And it dosnt matter if I'm stopping slow or slamming on the brakes. I put on the post I tested it slamming on the brakes because it happen more often slamming on the brakes. Then me driving around base waiting to see if it would stall


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Old 08-14-2014, 03:54 PM   #22
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It shouldn't be stalling like that. It still sounds like the IAC to me.

When you get back from maneuvers, we'll continue our quest to get your car running correctly...
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Old 08-14-2014, 05:10 PM   #23
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Thanks stray bullitt


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Old 08-14-2014, 05:16 PM   #24
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Listen to Stray and if that doesn't work, check your fuel pressure
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Old 08-14-2014, 08:05 PM   #25
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I'm having the exact same problems, just to know, what's Cop and iac?
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Old 08-14-2014, 08:18 PM   #26
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cop is coil on plug. its what sits on top of your spark plug
iac is idle air control it is designed to adjust engine air intake at idle which controls the engine idle speed.

The OP replaced his coil on plug (COP) because of a misfire. Is your car throwing any codes? or what is it doing exactly?
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Old 08-14-2014, 09:15 PM   #27
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Rpm get too high like 2k on neutral with the car cold and warm, and it keeps up while I'm drivingg too, until I turn it off. It will do the same with very low rpm but it dies by itself. I few times during normal driving the engine starts sputtering and I get the engine light and service light. I got three codes Click image for larger version

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Old 08-14-2014, 09:16 PM   #28
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Thanks for the translation too lol
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Old 08-14-2014, 09:30 PM   #29
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p2104
p2111
p2135

from what I read its the TPS
I assume your car is tuned by diablo
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Old 08-14-2014, 09:41 PM   #30
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Your car is a little different than ours because it doesn't have a throttle cable. The throttle movement is done by that actuator that your tuner is referring to. It seems like the TPS has detected a fault also.
Im guessing, but like TurboCobra eluded to in his post, the problem is probably related to the throttle actuator, or as it is referred to above, "the spring/coil thingy"...
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Old 08-14-2014, 09:52 PM   #31
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Your car is a little different than ours because it doesn't have a throttle cable. The throttle movement is done by that actuator that your tuner is referring to. It seems like the TPS has detected a fault also.
Im guessing, but like TurboCobra eluded to in his post, the problem is probably related to the throttle actuator, or as it is referred to above, "the spring/coil thingy"...
Or that's what it was referred to before TurboCobra edited his post.
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Old 08-14-2014, 09:52 PM   #32
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apparently is seems to be throwing off the computer looking at the voltage between the TPS and Pedal and after reading a few different threads, upgrading the whole throttle body is what people seem to do. If you can afford to.

hahahah I had to edit that, but its the rite idea

but check the spring, check the TB and check the voltage at the tps
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Old 08-14-2014, 10:13 PM   #33
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Haha yeah I just cleaned the tb and it was filthy, I might just upgrade soon am is having a sale so it's a good start lol I'm gonna check the spring tomorrow. Oh and OP, sorry for high jacking ur thread lol
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Old 08-14-2014, 10:15 PM   #34
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was the issue before or after u cleaned it?
you have a diablo tune correct? have you tried putting your stock tune back on?
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Old 08-14-2014, 10:33 PM   #35
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Before and after, and I'm gonna try to reload the tune, I have 93 gas in it now, will I have a problem switching back? Also I got dual exhaust, screaming demon coil and cai
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