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How do I stop engine pinging
#293161 09/18/01 05:18 PM
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Volney Boswell Offline OP
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Volney Boswell
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Recently I have been experiencing pining from my engine despite the fact that it?s not overheating etc. Sometime ago I replaced the timing belt and after I noticed that the engine would not rev out when stationary, however, it does so when driven. It should be noted that prior to changing the belt it would rev out when stationary. In addition, it shows no sign that the valve timing might be incorrectly set as it starts very easily etc. Any opinions, suggestion and views on how I can resolve this problem will be greatly appreciated.
Re: How do I stop engine pinging
#293162 09/18/01 06:15 PM
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Y-Town, Ohio
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trek 4500 Offline
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run higher octane gas?

No car anymore ;\ (taking a break from driving due to several misfortunate occurances)
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Re: How do I stop engine pinging
#293163 09/18/01 06:57 PM
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St. Louis
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Luckie13 Offline
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Quote:
Originally posted by Eric C:
run higher octane gas?


I noticed that immediatlly, high octane 91\93 has significant less pinging and I also get an extra 30mpt (miles per tank) it's just more efficiant.

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Re: How do I stop engine pinging
#293164 09/19/01 11:21 PM
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Volney Boswell Offline OP
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Thanks for the suggestion folks. However, the highest-octane gas that?s available to us in this part of the world is 90, and we have no way of knowing whether we are actually getting that. Does anyone know if there is a way of retarding the ignition timing.
Re: How do I stop engine pinging
#293165 09/19/01 11:49 PM
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Conshohocken, PA
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PA 3L SVT Offline
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Drop some Toluene in there to "brew your own" high octane gas. There is a thread currently active about it, and I've been considering doing it myself. It's not as silly as it sounds at first.

1998 Silver Frost SVT Contour born on...8/28/01[/i]
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Re: How do I stop engine pinging
#293166 09/20/01 12:07 AM
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Houston Texas U.S.A
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did you check your fuel pressure? Just a thought, I had all kinds of pinging problems with my 94 MustangGT a while back low fuel pressure was the culprit!

'69 Chevelle SS
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Re: How do I stop engine pinging
#293167 09/20/01 04:28 AM
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Belleville, IL USA
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javaContour Offline
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Quote:
Originally posted by Volney Boswell:
Recently I have been experiencing pining from my engine despite the fact that it?s not overheating etc. Sometime ago I replaced the timing belt and after I noticed that the engine would not rev out when stationary, however, it does so when driven. It should be noted that prior to changing the belt it would rev out when stationary. In addition, it shows no sign that the valve timing might be incorrectly set as it starts very easily etc. Any opinions, suggestion and views on how I can resolve this problem will be greatly appreciated.


Engine will not rev very high while not in gear if you have an Automatic Transaxle.

Another thing to check is the MAF wire. It gets crudded up and the computer get a bit confused about how much air is entering the engine. It thinks less is going in because the dirt on the sensor wire acts as an insulator.

First comes mild pinging, then you will see a code P0171 (IIRC) indicating a lean fuel mixture.

I'm sure someone here has posted how to clean the MAF, so use search.

Can't cost much if you DIY, and as long as you don't break anything, it can't hurt.

Cheers,

TB

Tony Boner
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Re: How do I stop engine pinging
#293168 09/23/01 05:11 AM
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Bill D Offline
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Just to ask I assumed all modern engines had a knock sensor and would retard the timing before you can hear any pinging?
Re: How do I stop engine pinging
#293169 09/23/01 07:49 PM
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Rockford Mi USA
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Terry Haines Offline
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Only the Duratec has the knock sensor,I'd re check the cam timing.

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Re: How do I stop engine pinging
#293170 09/24/01 01:30 AM
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Lompoc, California
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Bob Blaylock Offline
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Terry Haines wrote:
Only the Duratec has the knock sensor?
  The official Ford service manual for the 1996 Contour/Mystique seems to make it very clear that both engines are equipped with knock sensors.  It describes the procedure for removing & replacing it, with differences noted for the two engines, and different torque specs for the two engines.

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