this is what's going on , i don't know if its normal but or if something might be wrong . i have a 2001 5.3 and that every time i start it ,it starts and idles as if it has a cam , then 5- 10 seconds later it will smooth out . is this normal with a tune ? i have a nelson tune . oh and this is with the engine hot or cold . your feed back will be vey helpful.
So it just idles rough? And did it start before or after the tune.
2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s
2004 Buell XB12s
Originally Posted by LamboDoNoMo
after the tune .
I would just email Allen about it.
2004 Buell XB12s
i give them a call tommorow. they might know whats wrong of the back
Yeah. Allen will take care of you.
2004 Buell XB12s
Check the fuel pressure regulator for a leak from the vacuum port. Also check for cold intake vacuum leaks. Both cause this complaint and are common.
mine does the same...
Mine does the same thing sometimes. I was told it's either the fuel pump, regulator or fuel injectors. I don't know how true that is, but I am already having problems with my fuel guage being accurate, so I am replacing the whole thing including the pump. If that doesn't take care of it I will move on to the next piece of the puzzel. My truck has 80,000 on her, so it can't hurt..... I don't want to remove the tank twice.
1999 GMC Sierra SLE sc sb 4.8l 4L60E, Comp 1.75 roller rockers, graniaelli maf, garneaelli wires, Aem brute force intake, BBK 80mm tb, Nelson tune, 2/4 drop, Denali rims, custom grill, Denalli guages, Edelbrock IAS shocks, Tahoe E-fans, Nelson harness, and tune, McGaughy's 2" drop spindles, New matched coil springs, Air Lift rear lowerd air bag kit, Air Lift wireless remote
List of things to do
4.10 gears and a new posi, Lt headers, Cam, Heads, Intake,
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