Hesitation problem is back.

[Kilgore Trout]

I gotta get a Predator, that is cool as shiot

 

[aparker813]

Is it between 1000-2000 RPM. Car sorta feels like it's surging/bucking?

my 99 gt does that and i havent been able to get any info at all on the problem...got anything for me?

 

[forpit2000gt]

my 99 gt does that and i havent been able to get any info at all on the problem...got anything for me?

do you have a tuner or t/a?

 

[aparker813]

do you have a tuner or t/a?

tuner or t/a...? not sure what that means to be honest

 

[forpit2000gt]

tuner or t/a...? not sure what that means to be honest

Some type of programmer for your computer, hand programmer, chip?
t/a is timing adjuster.
not flaming , but if you don't know you probably don't have either.
do you have any mods? if so, what? CAI?

 

[MGSTANG]

MAC CAi

 

[04GT]

I gotta get a Predator, that is cool as shiot

Yeah, I thought it was really cool too. There's alot more data also. I just posted the stuff that looked like it was relevant to possible fuel or sensor issues. If you wanna see what else is available with Predator, go to their website and download the owner's manual. It lists all the parameters that can be monitored.

 

[aparker813]

Some type of programmer for your computer, hand programmer, chip?
t/a is timing adjuster.
not flaming , but if you don't know you probably don't have either.
do you have any mods? if so, what? CAI?

i figured that much just had to make sure...and no i have nothing of that sort. car is all stock with the exception of a k&n drop in, flowmasters and springs and such. and im not meaning to hijack the thread, so my apologies to the original poster

 

[nex2nutin]

You said that when you check your plugs it had oil on it. have you checked it again to see if the oil has returned? If it has that could be your problem, change the seals. oil + advance spark= not good.

 

[hotdog71]

I think I will do some data logging with my Predator too this week and see if i am getting the same kind of readings that you got...

 

[04GT]

You said that when you check your plugs it had oil on it. have you checked it again to see if the oil has returned? If it has that could be your problem, change the seals. oil + advance spark= not good.

What seals are you talking about?

 

[timeless2]

Have you ruled out the IAC?

 

[04GT]

Have you ruled out the IAC?

No. Why or how would IAC cause this kind of problem?

 

[nex2nutin]

What seals are you talking about?

It could be your valve stem seals. You should check your compression on your cylinders just to make sure your before opening your valve cover. And also check your pvc for excessive blowby.

Just things that had happened to mine when i found oil on my plugs.

 

[99MustangGTVert]

Subscribed. Man, when I first read the beginning of this thread I thought I had written it. Ive been having this same issue. While it was stuttering I pulled over and checked the fuel pressure and it was way low so I got the fuel pump replaced. Car has been running fine, but now the prob is back, not as bad as before, but exactly as you described. It seems that if I push it when its stuttering it will stumble until the motor dies, if I baby it its ok. Shut off the car, wait, and its back to normal. Weird. I cleaned the MAF, IAC, and replaced the TPS and ECT sensors to no avail. Checked the plugs, they looked great COPs all good.

About the TPS, it will be stuck the best thing is drill the screws out, and replace with hex heads so next time no problem.

 

[blacksheep-1]

Here's something to look at, my car did the same thing after a blower install. It seems that under certain circumstances the car would hesitate or buck. This is during "tip in" and in my case it was the result of some of the programming. I took the (human) programmer with me on a couple of test drives and between slightly modified chips were able to tune it out.

 

[smokin00GT]

Sounds like a mass air problem. All of my supercharged cars have done this. I just had the mass air tables changed in my tune and viola---no more bucking. It sounds like your tune stinks.