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Old 10-14-2004, 09:55 PM   #1
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Knocking engine

Is somebody has experienced a knocking engine problem with a very low mileage 7022 km ?

The problem occurs with a cold engine as soon as it warms up everything seems OK.

PS I checked the oil level it's OK.



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Old 10-14-2004, 10:06 PM   #2
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Let it warm up...
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Old 10-14-2004, 10:30 PM   #3
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Is your engine does the same as mine ?
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Old 10-14-2004, 11:07 PM   #4
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Is it just one big knock right after you start it up?
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Old 10-15-2004, 12:08 AM   #5
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No, in fact the usual "scenario" is : the time to start the engine to let it idle for 15 to 20 seconds and to run a couple of blocks and then if I let the car at idle (traffic light) altogether maybe 1 minute or so... I will hear the knocking sound and it will disappear after 1 or 2 minutes of idling...

According to you, could it be serious...

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Old 10-15-2004, 12:25 AM   #6
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I've never had this problem. I generally let mine run a bit on a cold morning until the engine warms up then guage is pointing at normal.
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Old 10-15-2004, 06:39 AM   #7
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Run a little higher octane. What octane gas do you run now? I would try 89/90 if you use 87, or try 92/93 if you use the previous one.
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Old 10-15-2004, 02:52 PM   #8
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I had a knock sound like that in mine too, till I started using higher octane gas...
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Old 10-17-2004, 08:23 AM   #9
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I use the 87 I'll try the 89 next time (actually my tank is full)

Thx I'll try it for sure

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Old 10-17-2004, 09:40 AM   #10
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Quote:
Originally Posted by Black Panther
I use the 87 I'll try the 89 next time (actually my tank is full)

Thx I'll try it for sure

BP
Ya know, you can go to wal-mart or something and get some octance booster if you got a full tank.
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Old 10-17-2004, 02:46 PM   #11
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I got pinging today for the first time ever, I use 89 octane, my next option within reasonable distance is 93, no gas stations serve other octanes. Would the fact that im a few miles over due for a tuneup factor in at all? PS I jus broke 100,000 last night
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Old 10-17-2004, 03:18 PM   #12
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Quote:
Originally Posted by Crispy
I got pinging today for the first time ever, I use 89 octane, my next option within reasonable distance is 93, no gas stations serve other octanes. Would the fact that im a few miles over due for a tuneup factor in at all? PS I jus broke 100,000 last night
do the tune up

on a side note yankees up 3-0
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Old 10-17-2004, 03:31 PM   #13
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I am, did we have an article in the forums on the recomended 100,000 mile tune up or was that on the old site?

Great game last night, hopefulyl we can sweep tonight, doesnt matter as long as we clinch the pennant IN Boston, i want to see the feeling of losing to Yankees AGAIN on those bums faces.
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Old 10-17-2004, 04:03 PM   #14
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all that would be good, i wish i could contribute to the how-tos but damn smokedya took all the easy ones
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Old 10-17-2004, 06:17 PM   #15
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Yes, around 100K you should change your spark plugs. Ford and other manufactures put platnuim plug in their vechiles which are good for 100K. So it's most likely the electrode on your plug is worn down making the gap too big.
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Old 10-17-2004, 08:06 PM   #16
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you main (main barrings) might be going out
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Old 10-18-2004, 12:06 AM   #17
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I need to do a tune up more than likely. Its just a ***** to change the plugs out... what else do I need to change?
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Old 10-18-2004, 12:20 AM   #18
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brent - plugs, wires, fuel filter

about the octane booster -- it is utter crap. they sell these bottles for like $3-4 each and they raise your octane from 87 to 87.2. that won't make a difference at all on the knock meter. octane boosters increase in tenths instead of full points.

i doubt his main bearings are going out already. he has a 2004.5 mustang and with roughly 3200mi on his car, i would certainly hope it's not the bearings.

lastly, BP - if the higher 89 octane doesnt fix it, take it back to ford. you still have a warrenty on it and it shouldnt make that noise at all. heck, you could take it back now because the v6 mustang is designed to run on 87 octane and you shouldnt have to spend $0.10 more each gallon because it is causing detonation. your call though of course
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Old 10-18-2004, 03:43 PM   #19
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Quote:
Originally Posted by Black Panther
No, in fact the usual "scenario" is : the time to start the engine to let it idle for 15 to 20 seconds and to run a couple of blocks and then if I let the car at idle (traffic light) altogether maybe 1 minute or so... I will hear the knocking sound and it will disappear after 1 or 2 minutes of idling...
So the car "knocks" while idling? Then it must be something else. Since its a 5spd it could be the throw out bearing making noise.

Is the A/C on when it happens?

You do not get spark knock at idle. It must be something else.
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Old 10-19-2004, 02:19 PM   #20
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I tried the booster and that darn noise was still there, I went to the dealer and I get an appointment on Thursday morning. They better fix it correctly (engine or clutch) I'm becoming mad and sorry in the same time... I like that car...

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Old 10-23-2004, 10:43 PM   #21
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knocking could be...

I read in a scientific magazine where it explained cylinder knocking. I think your knocking could be coming from using high octane fuel when your supposed to be using regular. People get the idea that using better grade fuel will help your performance, not so. Yes it's cleaner but if your car manuel says to use regular, then your car is built for regular and anything higher will be basically doing lil to help the car thus wasting away dollar bills. So use fuel injector cleaner.
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Old 11-01-2004, 06:25 AM   #22
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Can You Hear It When The Windows Are Up? I Use 93 Octane, Using Mobile One Full Syn. Oil, And 70,000 Mi On Her And I Have A Slight Knocking Noise On Startup. She Lasts For About A Minute And Then The Sound Dies Away. But The Noise Is Very Hard To Hear If The Windows Are Up. So If You Take It To Ford, Make Sure You Tell Them To Listen Outside Of The Car Or They Will Not Hear It. I Have Had It To Ford Twice For This Noise And Only After I Stood There With Them Did They Hear It. Which I Don't Mind Except That They Charge You For The "investigation Time". Go Fig. The Second Time I Was Told That V6 Do This Because Of Their Cams Or Something...can Anyone Clarify?
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Old 11-01-2004, 08:28 AM   #23
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First off...you don't have to capitalize every word lol. But about the knocking...I dunno, let Ford look at it if it's still under warranty. If it was my car (not under warranty) I'd try higher octane fuel, check everything in engine. Change my oil, regardless of when I changed it last and pray for the best. If it kept up I'd prolly try spark plugs and a few other things.
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Old 11-01-2004, 02:23 PM   #24
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sorry about the caps...curse of my trade.

back to the important subject...mustang. i keep her up to date all her changes and schedules, this is how i know ford's answer on the subject. unfortunately i have just gone beyond my warrenty so i will try all those things you mentioned and hope for the best. i just did not want to proceed further with mods if i had potentionally a very serious problem and if someone else was experiencing it...maybe find a solution.
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Old 11-01-2004, 05:19 PM   #25
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sorry about the caps...curse of my trade.

back to the important subject...mustang. i keep her up to date all her changes and schedules, this is how i know ford's answer on the subject. unfortunately i have just gone beyond my warrenty so i will try all those things you mentioned and hope for the best. i just did not want to proceed further with mods if i had potentionally a very serious problem and if someone else was experiencing it...maybe find a solution.

I'm no mechanic but from what I've read in that scientific magazine and from what I'm hearing from you, I'm willing to bet that lowering your octane to regular could be your answer(along with changing your spark plugs). Try it for at least a month after you finish the last gallon of 93 octane. Knocking is when the cylinders miss fires or fires one too many times,so it's a fuel thing and spark plug thing. But it's always good to get a second opinion. Good luck.
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Old 11-02-2004, 07:57 PM   #26
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dosent higher octane fuel burn cooler lessing any chance of detination? Why would this hurt you car or effect performance. I have learned that when I ran a plug 1 step cooler my car didnt run as well with the stock rated plug. Changing spark plug gap didnt help either. I run 93 with my motorcraft plugs gaped at 42. and my car runs great on the higher octane fuel giving me a "buffer zone" against detination. is the noise at idle or under load? it may be a lifter noise if at idle. Either way like sugested, change the oil and look at your plugs. Quality fuel shoudnt hurt your car. Racing fuel like 107 octane will hurt your cats and cause them to clog. 93 or under should be ok for your Mustang.
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