Stumble?
Stumble? Id say around 2500 or so if I punch it to WOT it somewhat will stumble almost like a clutch slip but not then after 3000 its all right. Ive checked plugs and wires so its not that. any suggestions? If it helps I removed the AIR pump but not the solenoid yet, just the pump the tubes and blocked them off I got to take the rest out.
Launching!
Joined: Sep 2004
Posts: 273
Likes: 0
From: Orange County
I have an a4 and i have the same prob.....it's been mentioned on here with alot of our cars....noone has came up with a fix or an definite prob....plugs,wires,o2's...etc..all been checked......mine always stumbles between 1500-2000 rpm......it's driving me ******* nuts........somebody has to have had this same prob and got it fixed.....SPEAK UP PLEASE!!!!
thats because the described symptom makes no sense. a slipping clutch would indicate an acceterating engine with no corresponding vehicle acceteration. a stumble is no engine acceleration at all. so there is no way(that i can imagine), a stumble can seem like a slipping clutch. its hard to diagnose something without a good description of the symptoms. my guess with the info given would be sensor related like a TPS or MAP sensor. how many miles are on the car?
ur TPS is probably toast. after a while, the contacts of where u have the throttle plate at the most wear down and dont make as good of a connection. try a new TPS and let us know what happens.
Launching!
Joined: Sep 2004
Posts: 273
Likes: 0
From: Orange County
Slowpoke....I don't mean to hijack this thread...and if i'm wrong on the situation...dub, you can correct me. But let me explain this once again, ive posted on this subject plenty of times, cuzz lots of people are having the same or similar symptoms. For my ride a 98z w/ 120 on the ticker it stumbles (does not accelerate correctly) at or around 1500-2000 rpm. There is another thread posted today by blackhawk J listed as a flat spot under throttle, same symptoms. No matter where im at, on the highway, around town or what, at that range i bog down. I'm just surprised that as many times as this sub has came up that NOBODY has found the prob. Of course it could be this or that, i've checked plenty of things I guess ill just have to take it to a shop and pay the $$$$ to have them figure it out. Altough i haven't checked the tps(throttle positon sensor???) it just doesnt sound like it......wouldn't it do the same all over the rpm range. Whatever it is, is only effecting our cars when the revs are in the lower range????hopefully that is a better explaination.....now can you help????
u dont need to take ur car to a shop. im tellin ya man, go get a new TPS (throttle position sensor). it will cure ur problem. the TPS works like this... its like a wiper motor. it touches several different contacts inside as u open the throttle blade. it sounds like one or maybe a few of these contacts have worn down causing a bad connection and making you stumble. a TPS will cause this exact symptom of stumbling or falling on its face at only certain RPM's. i think its like a 30 dollar part and takes all of 1 minute to replace. try it man, please! and let me know what happens.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo before you pay for one, try to find a fellow ls1techer who will let you install theirs for testing reasons to verify. post in your regional section if you do not know anyone already.
u can get it at autozone or any parts store. and incase ur wondering, u do NOT need to have the SES light come on to experience this problem. ive seen cars have a TPS that is just totally fried throw no code at first. it was so fucked up, we would start the car and it would die right away. we bypassed the TPS with a special tool and it fired right up and idled properly. thats when we knew we had found the culprit ha ha. 
Launching!
Joined: Sep 2004
Posts: 273
Likes: 0
From: Orange County
blackhawk....we have the same **** going on....btw, i changed the tps...no luck.So far i've changed tps,fuel filter,and o2's,plugs,wires.....NOTHING is working. Im thinking it has something to do with the ecm.I don't know what to do now......
I was experiencing the same symptoms, the engine sort of laying down or dead spots as the car accelerated. I bought two cats to replace the 98k mile converters that were on the car and the symptoms went away.
Teching In
Joined: Dec 2005
Posts: 28
Likes: 0
From: Omaha, NE
I know this is an old post but did anyone ever figure out the solution to this problem because I am also experiencing this issue on my 99 Camaro M6. It is just like there is a blank spot of no acceleration/power in the engine during that RPM range it is so slight and only noticable if you are driving the car. I have tried a new TPMS sensor with no luck. I am going to be doing "Race" headers and ORY once they arrive thus eliminating cats and EGR/AIR and I will probably also be doing a cam swap at the same time with all of the recommended parts for install of that. Any ideas or input would be great!
having same issues, have cleaned maf, switched 02's, new oil sender, etc etc... my oil pressure gets low, and idle drops to around 400/500 rpm at stop lights... anybody? ima try the tps (did you get the "tps" reports? read the memo! lol), and maybe clutch switch? wtf with these cars!
it is more noticeable when i put new gas in... Sh*t in my gas tank???
it is more noticeable when i put new gas in... Sh*t in my gas tank???
