Pinging at full throttle ??????

Igofaster13 · Jun 19, 2006

My girls car is a 95 gt, it pings at full throttle, it is stock, but has a kn and flows. What could be wrong with it. Thanks

RIO5.0 · Jun 19, 2006

Use the search feature and you'll find a nights reading on this very subject...It can be a mofo to chase down and its inherent to the 95...
It can run the gammit on parts and variables that contribute to pinging....
I for one had a pinger and never did get it to swap til it swapped heads...Can't make it ping now..
I would suggest reading up some and make a decision on what direction to start...
I would make sure the state of tune is decent and being conservative (10 deg) or less will usually make it more livable...From there it can run into various sensors that some have changed and made it clear up...
Good luck and start reading...Seems like no easy answer on this one...

bill302 · Jun 19, 2006

check the timing and repost results....if timing is in spec....10-12 degrees btdc..you might need to run seafoam through the intake to clean any carbon build up.also if this is just a one time occurence could be bad gas...running higher octane should clear up pinging but it should run fine without pinging with 97 octane...then again it might need a good tune up....these are good places to start but it could be 1 of 1000 things....

Swarzkopf · Jun 19, 2006

Have you ever messed with the cars timing? If not, it's probably the MAF. Quite honestly, even never seeing the car, I'd put down $20 that it's the MAF right now.

My own car and so many other 94-95 GT's I've come across have had the exact same issue.

When the MAF gets dirty or goes bad on our cars, seems the first symptom will be a lean condition at load or WOT. As the MAF gets worse, it alternates between pig rich and very lean (causing bad drivability).

Did the pinging start/get worse after you installed the K&N? Lots of time out of the box K&N filters have too damn much oil for our MAF to like- the oil gets on the MAF and it's all downhill from there.

I'd first try cleaning the MAF. Compressed air is what I trust...if it's real bad, alcohol on a q-tip seems to work too and others have used brake cleaner. If that doesn't clear it up, try swapping the MAF from another car on to see if it still pings. If it goes away, you need a new MAF.

you might need to run seafoam through the intake to clean any carbon build up

Good advice (even though in this care I betcha it's the MAF). My 93 LX 4-banger was pinging like mother****er...with 140K miles on the clock I figured the carbon buildup was pretty bad. The smoke show from the SeaFoam was very impressive. It hasn't pinged once since (on 87 to boot).

HISSIN50 · Jun 19, 2006

I'm sure someone mentioned it - but check FP at WOT. It's funny that you only get the pinging there (when demand is greatest) and not during other times. I'd be checking for a weak pump initially. How long as the fuel filter been on there?

Good luck.

gcomfx.com · Jun 20, 2006

I had the ping..... Was scared to put nitrous on the car. Dropped the timing, put in Autolite 24s (colder than stock and only $1 each at wally world). What made the biggest difference was making the gap on the plugs closer. I run .035 for the juice. I don't have a ping now unless I'm spraying 125 shot and my timing is too high.

--------------------------

Definately, Check your timing. If it's out of whack, try to reset it. If it doesn't stay, I would look at the dampener, it could have slipped or is getting old and wobbly. Also if your timing is jumping around your dizzy could be going out.

illwood · Jun 20, 2006

Another thing to check is oil getting in the plenum from the EGR line.

Igofaster13 · Jun 20, 2006

Swarzkopf said:
Have you ever messed with the cars timing? If not, it's probably the MAF. Quite honestly, even never seeing the car, I'd put down $20 that it's the MAF right now.

My own car and so many other 94-95 GT's I've come across have had the exact same issue.

When the MAF gets dirty or goes bad on our cars, seems the first symptom will be a lean condition at load or WOT. As the MAF gets worse, it alternates between pig rich and very lean (causing bad drivability).

Did the pinging start/get worse after you installed the K&N? Lots of time out of the box K&N filters have too damn much oil for our MAF to like- the oil gets on the MAF and it's all downhill from there.

I'd first try cleaning the MAF. Compressed air is what I trust...if it's real bad, alcohol on a q-tip seems to work too and others have used brake cleaner. If that doesn't clear it up, try swapping the MAF from another car on to see if it still pings. If it goes away, you need a new MAF.

Good advice (even though in this care I betcha it's the MAF). My 93 LX 4-banger was pinging like mother****er...with 140K miles on the clock I figured the carbon buildup was pretty bad. The smoke show from the SeaFoam was very impressive. It hasn't pinged once since (on 87 to boot).

So I should change out the mass air flow sensor? I have not messed with the timing and I dont think anybody has ever messed with the timing.

Swarzkopf · Jun 20, 2006

I wouldn't say rush out and buy a new one right away...try cleaning yours first. If that fixes the problem, great. If not, swap a new one on. If that fixes it, great, if not, return it. At that point if it's still pinging you have ruled out the MAF...but I still think that the MAF (either cleaning yours or buying a new one) will fix your pinging.

Good luck, let us know!

bill302 · Jun 20, 2006

heres a link that demostrates how to clean the maf sensor...
http://www.muscularmustangs.com/maf.php

mo_dingo · Jun 20, 2006

yeah all you need to do is clean the maf, it shouldn't be bad just because it got oil on it. Just can't read accurately.

The maf/iat/ect are the main sensors that read when you are at WOT. Clean both the maf/iat and RESET THE COMPUTER. You have to reset the KAM after you clean a sensor so the computer can relearn the new sensor and start with a new adaptive strategy.

If it doesn't ping at part throttle, the O2's are likely still ok.
Scott

Igofaster13 · Jun 20, 2006

I Cleaned the maf with electronics cleaner and the ping is gone ! Thanks everybody.

Swarzkopf · Jun 20, 2006

Good to hear!

reddy351 · Jun 20, 2006

Did cleaning the MAF make the car feel any faster? I'm just curious because I would assume that now it's getting the proper fuel load, it should be. I have the same problem but I can't seem to find my "T-20 Security" bit.

Igofaster13 · Jun 20, 2006

reddy351 said:
Did cleaning the MAF make the car feel any faster? I'm just curious because I would assume that now it's getting the proper fuel load, it should be. I have the same problem but I can't seem to find my "T-20 Security" bit.

Ya the car seems a little faster and the idle is a little smoother. I reset the computer too by the way.

Synned · Jun 20, 2006

I have the same problem, exactly. Full throttle only, but not untill I'm going like 55+.

Pinging at full throttle ??????

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