Running problem on warn starts any ideas!
Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
Running problem on warn starts any ideas! I have a 98 Z28 A4 with Mac's ORP, 3200 Vig, and a lid. My air system and egr has been removed and deleted. The car will only do this on warm starts. After I start the car It will run and idle fine until Iput in drive and push the gas. Thats when it allways does it. It will stumble, and pop, and try to die. This will last about 3-4 seconds then it will spring back to life and run fine.
Any ideas?
Jeff
Any ideas?
Jeff
Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
Re: Running problem on warn starts any ideas! No, I allready had the cam in. It started after I removed the air and egr systems. But I don't see how that could cause this. Also I've removed the cam to see if that was the problem and It still does it.
Any more ideas?
Any more ideas?
Re: Running problem on warn starts any ideas! did you delete all the egr SES codes and etc? I know when i had EGR and it went bad my car woul not idle in gear at stop lights. All from a bad EGR... glad I deleted it 2 years ago now
Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
Re: Running problem on warn starts any ideas! Im sure it was all deleted. Besides It has been off the car for about a month now and I have not seen a ses light. I was thinking It could be a sensor of some kind. Maybe a O2 sensor.
Re: Running problem on warn starts any ideas! Firechicken mine does the same thing exactly. I can not figure it out. ive changed fuel filter, plugs,even put in new fuel pump(Walbro 340). I thought it was water in gas and have removed and cleaned my tank 4 times. I never get any ses lights and Thunder has tuned my car. Im begining to think it is vapor lock due to the fact it happens only when the car is warm. I did notice how close the header is to the fuel line on drivers side. I am going to wrap those lines and see if that helps. Ive already done the lines under the car where they cross the exhaust. Please somebody chime in and help us out, Jason.
TECH Apprentice
Joined: Dec 2001
Posts: 314
Likes: 0
From: Salisbury, Md
Re: Running problem on warn starts any ideas! How long does this last? If it is only for approximately 15 seconds after a warm start then it probably can be solved by adjusting your volumetric efficiency table in ls1 edit. Just multiply values from 400 rpm to 1200 rpm by 70-50% and it will make your warm start problems go away. It made my warm and cold start problems go away but I'm also running a 224 110lsa cam.
Trending Topics
Re: Running problem on warn starts any ideas! Its not that long after start up. Ill start the car, pullout of my driveway and 2 or 3 seconds down the road it will spit and sputter for a couple of seconds and the it goes away. Some times i put the car in neutral and give it a pop and it evens out.Some times it worse than others on the same day. Also this happened last year then it went away for a few months and then it just came back. I know its not the tuning cause my car has been tuned for awhile and no problems. I had it tuned with just boltons and then again with cam at Thunder. Please someone help this is driving me crazy. Jason
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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 Thread Starter
Staging Lane
Joined: Dec 2001
Posts: 84
Likes: 0
From: Lakeland,FL
Re: Running problem on warn starts any ideas! I've found something that might be the problem. I had the car idleing this morning and I was checking to make sure that all the plugs on the TB, and MAF were snaped in tight. When I first touched the MAF plug the car stumbled and almost died. So I gave the wires a little wiggle and sure enough everytime I wiggle the wires the car will try to die. I think It's either a bad conection in the plug or the wire itself is almost broken inside the insulation from the plug being removed and installed so many times.
Re: Running problem on warn starts any ideas! I also checked that this morning too, but in didnt help and I popped an ses this morning and will go to AutoZone to see what it is. Hopefully whatever it was finally gave out. Did the wire problem fix you car? If so let me know and I canlook at the plug more closely. Thanks, Jason
Re: Running problem on warn starts any ideas! No dice on the ses light it was a "Idle too high" code. Got to thinking about the MAF and went down the road and borrowed my buddies off his 98, car acted up with that one too. Im at my wits end. Does anyone have a clue? Someone has got to have had this problem before. Jason
Re: Running problem on warn starts any ideas! I read that other post also and his problem sounds familiar. My car has acted up after sitting in bank line too. I dont have any way to ckeck the O2s out. I dont mind going to buy them but want to know thats what it is.
Re: Running problem on warn starts any ideas! Im thinking its the drivers side O2 sensor. Got to looking under car noticed the wire on sensor was pinched and running close to header at 2 points. So I got it out of a bind and rerouted it and car started acting real good so far. Its barely acted up on warm starts if it does at all. Im putting new Delco sensor on tuesday along with some new plugs and I hope this is it.