FlamedZ

Hello everyone,

I have a 2000 Trans Am WS6 and ever since I bought the car it has had a mild bogging problem and I was wondering if anyone had an idea what it could be?

The only mods on the car are a clear lid and LM 1 catback but it was completely stock when I got it and it still did it then so I don't think the mods have anything to do with it.

It will bog or cut out sometimes when I give it gas or am going up a large hill.
It doesn't happen if I stomp on it or if I am crusing along at one speed, it only happens under mild acceleration.

I have replaced plugs and plug wires and the fuel pump but it made no difference.

Also sometimes the car will ping when under load, I only run 93 octane but it still does it and has done this ever since I bought it. I think this is because it needs a knock sensor? Could a bad knock sensor also cause the bog??

The only code the car is throwing is that the passenger side cat is operating below threshold.


Thanks for any help!

Pinky93

Have you checked the fuel filter?

vma-542

mine was doing someting like that, it was the maf sensor.

FlamedZ

Yes, I replaced the fuel filter and I also cleaned the maf but it made no difference.

I also did the seafoam treatment

rpmauto

iTrader: (14)

if you have access to a scan tool see how many grams per sec the maf is pulling. mine never threw a code, but the car ran good, just no power at all. maf was only pulling half the grams it should and going full lean at wot. you could also have a coil taking a crap, once again if you can get a scan tool check out the misfire history that might put you in the right direction.

FlamedZ

Yes that's what I'm thinking I need to get access to a scan tool.
I also have a 94 Z28 would the MAF on that be the same?

Pinky93

Similar thing happened to me when I descreened the 85MM SLP MAF. Ran perfectly until then. Car ran fine in town, but on highway it acted like it had water in the gas or something.....just a slight hesitation or stumble. Put the stock MAF on and no problem.
It took quite a while, but it finally did throw a "lean" code.

BTW - before the code, I was also able to see it on AutoTap.

Good luck.

nate91gst

may sounds stupid but run the car w/ the maf unplugged if the car runs the same way then thats what it is. Either that or try just tapping on the maf w/ a screwdriver handle if the car shudders idle you know the maf is bad

socmguy

iTrader: (18)

All above suggestions are good. Look around for a vaccuum leak as well.

FlamedZ

Thanks for the help, I will check the MAF

Also I forgot to put in the original post that if I don't allow the car to warm up before I start driving the bogging is worse.

FlamedZ

I tried tapping on the MAF with the car idling but it didn't make it shutter

Then I remembered when I bought my 94 Z28 it had a MAF on it with those plastic ends put on that don't have the screen or anything and I had taken it off and put a stock one on because I had problems with the car running rich and I was told the modified MAF could have been the problem, I still had the descreened maf laying around so I thought I might as well put it on and see what happens and now the car is running great so I guess the old MAF was dead!

Thanks for the help guys