New motor in lightning and a new problem

[2fAZT4U]

I have a 1999 lightning I just got it back last week. When I cranked up the truck I noticed it wouldn't idle at all if I took my foot off the gas it would cut off and then I relized the chip was turned off so I turned the chip on crank the truck now it will idle right under 1000 when I put it in gear the rpm's going up and down trying to cut off if I don't give it some gas when I turn out of my driveway it will turn off and If I stomp the gas out of the hole it will cut off I have to ease into it also if I'm going about 120 it wants to hesitate. I got Johnny Lightning to program the chip while I was putting the motor in I sent him all of the specs on everything I'm going to send it back tomorrow I just wanted to know what you guys think it could be. Here's a list of everything I've done.

JLP short block
head stud kit
comp cam stage 2
comp valve springs
patriot heads stage 2
headers
6lb lower pulley
2.8 upper
accufab single blade throttle body
90 mm mass air
JLP forced air intake
JLP electric fan
cobra R water pump
precision 2800 multi disc stall
dual 255 fuel pumps
125 shot of zex nitros
diablo revolution chip

 

[blownsvt]

i would put my money on it being the tune. probably because of the cams? check your IAT sensor, MAF and TPS.....make sure they didnt come unplugged.

 

[2fAZT4U]

I checked them. I was thinking it was the burn also. Thanks

 

[SVTman75]

I 2nd what he said. I've heard that trucks that have cams can be kinda picky about their tune.

 

[2fAZT4U]

Thanks

 

[PearlBlue L]

the first couple thousand miles on my new engine with the cams were kinda pissing me off. sometimes you gotta sit there for a little bit before you can put it in gear or it would stall unless i gave it some gas as soon as i put it in drive. how many miles are on the new engine... its not going to be perfect right away, gotta break that thing in.

 

[2fAZT4U]

Only about 500 miles

 

[DEVOURER]

when i got my built engine JL couldn't even get me a tune that would start the vehicle. I had to have RWTD tune it for me. Started right up and has driven perfect since. Try someone elses tune...

 

[Screaming01L]

I 2nd what he said. I've heard that trucks that have cams can be kinda picky about their tune.

You heard right lol. :read: