Problem: Do you have surging or hesitation when cold?

[BOOOOST]

In the mornings, or when the vehicle is cold, and I drive it in 1st gear down the street at around 15 mph, I can feel some slight surging, or hesitation, under a steady cruise. It isn't too bad, but you can definitely notice it. Once it warms up some it will go away totally, usually less than a minute or so. My vehicle is totally stock, was built in Nov. and has the YDH1 calibration (it came this way). Others have stated they too have this problem, even after they added mods.

Who all has this problem, and what have you done to fix it, if anything? If you have this problem please make sure you list your calibration code (QUD2, YDH0, or YDH1). Thanks!

 

[agof95]

Mine does it too. It was built 7/25 and is a QUD2.

 

[JMD0346]

Me too. I'm glad im not the only one.

 

[BOOOOST]

I believe that by changing the stock plugs out to a a better style, such as the Denso Iridiums, or NGK copper, would probably fix this, and I will do such to see if this will affect the situation or not. I'll let you all know soon.

 

[94SVT Coupe]

Mine too, YHD1. Stock minus the silencer.

 

[OverToad]

Mine does it, but so did my '97 Cobra, and it never had any kind of engine trouble.

I've kinda gotten the impression that cars that have more power tend to have rougher times in the morning.....

 

[BOOOOST]

Originally posted by 94SVT Coupe
Mine too, YHD1. Stock minus the silencer.

I should have stated I have no silencer either, but I seriously do not think this is causing our issue, although I know you weren't implying that.

My '96 Cobra did not have this issue. Lightnings do not either, Supras don't, Vettes don't, Porsches don't, Vipers don't, so I don't see why we should???

 

[03 Red Cobra]

Mine was built in 01/03 with YDH1 code and so far with only 75 miles on it, doesn't have it.

 

[BOOOOST]

If it is a plug issue, I'm leaning towards too rich a factory calibration, and it's causing the plugs to possess a cold foul state.

 

[JSHTROD]

I have the EXACT same problem. And I still have my silencer.

 

[mike_b_svt]

BONE Stock, same problem. Build 1/13/03, YDH? (not sure if 0 or 1).

 

[goinbyu]

Mine has it too, but I don't know what my calibration is yet.

 

[SuperSonic]

Mine has it too, bone stock, built 8/6/02, YDHO, not worried about it at all because it goes away after it warms up a little.

 

[fryingricecobra]

Mine does it too. I don't know when mine was built but I have had it since Jan. 03. I got it new. My code is YDH0. Mods are in my sig.

 

[DD2000GT]

Mine did as well, I just leaned the closed loop table a bit with my MAFterburner and - woolaa - problem fixed. AutoTap still shows the short term fuel trim at "0". I am pretty sure it is a plug fouling from pushing too much gas.

 

[stangin]

I noticed that once it kinda stumbled when I did not fully warm it up. I will pay attention more now that you mention it. Anytime a surge in idle happens it is usually due to a lean condition. I changed plugs to TR6's so I doubt this is it. I would be more suspect of the "lean" condition during warm up, hard to say for sure.

 

[sbc.cobra]

yep, i got it...for about 5-10 seconds. then it quits and is fine.

 

[jumpincactus]

Mine too. Did it bone stock. Does not do it as bad now after the mods. Catback and CAI.,Not sure what my code is. How the heck do you find that out.???

 

[Black Cobra]

Yes, but...only when the car has satup over night. I don't have the problem when the car is cold after sitting up for 9 hours while I'm at work. In the Morning, it only last for about 1/4 of a mile. After that I'm fine till the next morning. If I let it warm up in the morning for several minutes its fine.

On a side note, this condition is probably related to whatever causes my engine to stall if I get on the brakes hard during this first 1/4 to 1/2 mile.

 

[JoeAsheville]

Mine does it, but I really don't see it as much of a problem. I just need to make sure that when I pull up to the first stoplight in the morning leaving for work that I don't keep my foot in it and begin to alternately slap off the drive/coast faces of the ring and pinion. That can be nasty.