speedZ28

I have a 96 camaro lt1. I was out driving it the other day after the car warms up after a couple hours of driving her u come to a red light as ur stoping in gear (auto) waiting to turn green the rpm gage is jumping back and fourth from 500 to 1000 wth!!! So i have put new plugs,wires,cape,button, fuel regulator and i took intake off to put new intake gasket on and fixed all the oil leaks bc the oil leak was messing up my opti. Im kinda out of ideas do u guys think it mite need to be tuned bc i dont think it evet has nething would be greatly appriciate ne ideas at all thanks guys


All the stuff that is dun to car
Rr 1.6
Roller cam dont no spect
Roller lifters
Port and polished heads
And intake matches heads
Port and polished fuel rail
And shorty headers
If nething else is dun i dont not wat it would be. If u guys thinks it needs to be tuned and thats why its surging let me no thanks

Mike TexaSS

iTrader: (2)

Your EGR valve might be stuck open. Check the back of the intake.

fasttagurl

iTrader: (12)

If you do not figure this out feel free to bring it by the shop so we can thoroughly look everything over & see what's going on.

GreatWhiteZ28

iTrader: (15)

This......happened with mine awhile back when I had m LT1....

old93camaro

iTrader: (8)

could be your IAC value sticking

speedZ28

I just checked my egr its fine now the iac. I dont no much bout that isnt it located on top of tb if so cleaned that win i clean my tb bc it was all black ne other suggestions guys that would be great

GreatWhiteZ28

iTrader: (15)

if I remember correctly, "cleaning" your IAC won't fix it...if it's bad it's bad....

speedZ28

Is there a way u can check it or is that just a throw away and just buy another

redz_02

iTrader: (4)

I had the same issue a while back. Ended up being a bad TPS sensor.

transam5.7lt1

iTrader: (18)

Check engine light on?

speedZ28

No the light is not on every now and then it will come on and it says missfire, vacum or fuel but everything is good or its checking out good

speedZ28

Wouldnt a tps senser do it all the time if it was bad!!!!

redz_02

iTrader: (4)

It was only noticable at idle.

Jake_the_Snake

iTrader: (5)

not really. electrical parts often act up intermittently. my tps did somethin like this before i replaced it. now, it surges a little but it started after i had a stall put in. think its somethin with the tune

speedZ28

Is there a way to check the tps

redz_02

iTrader: (4)

They are pretty easy to find online. I would also take a look at the front 02's, but you said no code is being given.

Might consider a tune. How many degrees of overlap is your cam built for.

speedZ28

Man i have no idea? I dont no nething bout cam it was in car win i bought it.

redz_02

iTrader: (4)

96 Lt1's are MAF not speed density, correct? In that case I would also look at cleaning the MAF sensor, changing the fuel filter. Considering it has some engine mods, I would look into a fuel pressure guage just for future issues.

I would also inspect the TB to make sure everthing is sealing properly. If it is ported some of the screws may have came loose. Truthfully, it sounds like a vacum leak since you are not getting an SES light. If you can borrow a TPS I would try that out also.

speedZ28

Man i have looked every and mean every where for a vacum leak cant find one this is really hurting my head i checked last nite for that vacum leak today ill do the tps and let u no thanks brother for the info

redz_02

iTrader: (4)

Also, try cleaning the IAC, just be careful with it. Sorry about jumping around so much, just havn't worked on an LT1 in ages.

Lastly, fuel filter, and I would recommend installing an under hood fuel pressure guage. Helps alot in these situations.

Does it miss any when cruising once warm?