Cure My WOT Pinging

**bighoss88lx** · 09-11-2003, 10:26 PM

I have been having this pinging problem for a while now when I get on it. It dosent do it until the rev's get up to about 4000-4500 rpm's. Ive tried running 93 octane with about 15 degrees initial timing and I recently bumped it down to the lousy 10 degrees and it still does it. I have a good tune up and all of the associated parts are new. My plugs are a couple of months old and they looked brand new when I checked them recently. There gapped at .54. I'm lost as to what else it could be. Would a dirty ACT sensor cause that? Do I need an adjustable fuel pressure regulator to give me a little more fuel at the top end? Remember my car is still speed density and my mods are in the sig. I can use all the help I can get. Thanks in advance.

**12second5.0** · 09-11-2003, 10:40 PM

Are you sure your harmonic balancer is good?It is possible it has spun causing you to set the timing wrong.I ran my timing as high as 22 initial with no ping.That was with 93.

**bighoss88lx** · 09-11-2003, 10:43 PM

Well the balancer looks good. The rubber is still in it and hasnt fallen out. But I can tell the power difference when I go from 10 degrees to 15 or 16 degrees timing, so it's gotta be close.

**12second5.0** · 09-11-2003, 10:55 PM

How many miles on the engine?You may have some carbon buildup.

**bighoss88lx** · 09-11-2003, 11:00 PM

Im not sure on the mileage. The speedo has never worked. If the top of the pistons do have it what would be the easiest way to clean it off?

**12second5.0** · 09-11-2003, 11:07 PM

Try an additive you can put in your gas to try and clean it.There are some out there for this.It may be worth a try.

ThurgoodJenkins · 09-11-2003, 11:37 PM

Run plugs that are a step colder.

**bighoss88lx** · 09-12-2003, 07:46 AM

I was thinking about getting an additive to clean my injectors too but I believe a lot of those are gimmics. Does anyone recommend one in particular that works? What would be a colder plug from what I have? I for got which way the numbers went. An AFPR would be my last option. I need to get a guage and see how much PSI I have at WOT.

**bighoss88lx** · 09-12-2003, 02:16 PM

Couldnt I use autolite 24's to go to a colder plug?

ThurgoodJenkins · 09-12-2003, 04:13 PM

Quote:

Originally posted by bighoss88lx
Couldnt I use autolite 24's to go to a colder plug?

I'm not sure about the Autolite's but I run the TR6's in the Texas heat with no pinging at all with 10.5:1 compression.

And if you want the best injector cleaner, just run some 103 in there.:2thumbup:

**12second5.0** · 09-12-2003, 06:43 PM

Why should he run a colder plug?What kind of mods have been done to the car?Anything to raise the compression?If you did raise the compression then a colder plug is needed.Is your EGR valve working?I need some info to help ya!:2thumbup:

**bighoss88lx** · 09-13-2003, 07:39 PM

The compression ratio is stock and I have the EGR valve functioning but the EGR crossover on the back of the heads is removed. I was thinking of removing the EGR valve and the EGR vaccum thingy on the shock tower and take it off. I have seen a lot of mustangs run that way with no problems at all. I read on another forum that if the ACT sensor is dirty than it could cause a lean condition and the car would ping. I appreciate the help. Thanks.

ThurgoodJenkins · 09-13-2003, 08:07 PM

Quote:

Originally posted by 12second5.0
Why should he run a colder plug?What kind of mods have been done to the car?Anything to raise the compression?If you did raise the compression then a colder plug is needed.Is your EGR valve working?I need some info to help ya!:2thumbup:

I didn't say he needed a colder plug, I said it was a cure for pinging

I have 10.5:1 and 29 degrees timing and no knock here

**12second5.0** · 09-13-2003, 10:04 PM

Quote:

Originally posted by ThurgoodJenkins
I didn't say he needed a colder plug, I said it was a cure for pinging

I have 10.5:1 and 29 degrees timing and no knock here

:2thumbup:

**bighoss88lx** · 09-17-2003, 09:04 PM

I don't think the plugs would be the problem. I am thinking along the lines of a bad sensor or just not enough fuel getting to the fire. I will look into this in a couple of weeks so I can get my car out to the track.

09-11-2003, 10:26 PM	#1
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	Cure My WOT Pinging I have been having this pinging problem for a while now when I get on it. It dosent do it until the rev's get up to about 4000-4500 rpm's. Ive tried running 93 octane with about 15 degrees initial timing and I recently bumped it down to the lousy 10 degrees and it still does it. I have a good tune up and all of the associated parts are new. My plugs are a couple of months old and they looked brand new when I checked them recently. There gapped at .54. I'm lost as to what else it could be. Would a dirty ACT sensor cause that? Do I need an adjustable fuel pressure regulator to give me a little more fuel at the top end? Remember my car is still speed density and my mods are in the sig. I can use all the help I can get. Thanks in advance. __________________ 1988 Mustang LX Last edited by bighoss88lx; 09-11-2003 at 10:41 PM.

09-11-2003, 11:37 PM	#7
ThurgoodJenkins 13.7@103 Bone Stock! Join Date: Jun 2003 Location: Fastest apt in San Marcos? Posts: 206 Trader Rating: (0)	Run plugs that are a step colder. __________________ Insert fake time here

09-12-2003, 07:46 AM	#8
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	I was thinking about getting an additive to clean my injectors too but I believe a lot of those are gimmics. Does anyone recommend one in particular that works? What would be a colder plug from what I have? I for got which way the numbers went. An AFPR would be my last option. I need to get a guage and see how much PSI I have at WOT. __________________ 1988 Mustang LX

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09-11-2003, 10:40 PM	#2
12second5.0 Sie lieben, mich zu hassen! Join Date: Jun 2003 Location: Marion,Texas Posts: 9,000 Trader Rating: (0)	Are you sure your harmonic balancer is good?It is possible it has spun causing you to set the timing wrong.I ran my timing as high as 22 initial with no ping.That was with 93.

09-11-2003, 10:43 PM	#3
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	Well the balancer looks good. The rubber is still in it and hasnt fallen out. But I can tell the power difference when I go from 10 degrees to 15 or 16 degrees timing, so it's gotta be close.

09-11-2003, 10:55 PM	#4
12second5.0 Sie lieben, mich zu hassen! Join Date: Jun 2003 Location: Marion,Texas Posts: 9,000 Trader Rating: (0)	How many miles on the engine?You may have some carbon buildup.

09-11-2003, 11:00 PM	#5
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	Im not sure on the mileage. The speedo has never worked. If the top of the pistons do have it what would be the easiest way to clean it off?

09-11-2003, 11:07 PM	#6
12second5.0 Sie lieben, mich zu hassen! Join Date: Jun 2003 Location: Marion,Texas Posts: 9,000 Trader Rating: (0)	Try an additive you can put in your gas to try and clean it.There are some out there for this.It may be worth a try.

09-12-2003, 02:16 PM	#9
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	Couldnt I use autolite 24's to go to a colder plug?

09-12-2003, 06:43 PM	#11
12second5.0 Sie lieben, mich zu hassen! Join Date: Jun 2003 Location: Marion,Texas Posts: 9,000 Trader Rating: (0)	Why should he run a colder plug?What kind of mods have been done to the car?Anything to raise the compression?If you did raise the compression then a colder plug is needed.Is your EGR valve working?I need some info to help ya!:2thumbup:

09-13-2003, 07:39 PM	#12
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	The compression ratio is stock and I have the EGR valve functioning but the EGR crossover on the back of the heads is removed. I was thinking of removing the EGR valve and the EGR vaccum thingy on the shock tower and take it off. I have seen a lot of mustangs run that way with no problems at all. I read on another forum that if the ACT sensor is dirty than it could cause a lean condition and the car would ping. I appreciate the help. Thanks.

09-17-2003, 09:04 PM	#15
bighoss88lx Killing is my Business...And Business is Good! Join Date: Aug 2003 Location: Elmendorf, Tejas Posts: 5,959 Trader Rating: (1)	I don't think the plugs would be the problem. I am thinking along the lines of a bad sensor or just not enough fuel getting to the fire. I will look into this in a couple of weeks so I can get my car out to the track.