Does My Truck Need Tuned?

[shawnss]

here it goes i just installed my new rebuilt motor. i mostly rebuilt the motor to stock besides lowering the compression to 9.5.1 and a arp stud kit. im not trying to run more than 10 psi.but i left the tune i had on the stock motor on the ecu will this make my truck run bad. just wondering if this is what caused it or did i do something wrong with the motor i didnt build thr motor a local shop. when i step on the throttle the truck does not want to move like before. and the pyro climbs 500 degrees in a matter of 3 seconds climbing to 1200+ degrees. and the truck is turboed with a front mount kit. detriot speedworks

Edited September 10, 2008 by shawnss (see edit history)

[04CHASE]

sounds like you running lean , whats the afr? please tell me you have an afr guage?

[shawnss]

sounds like you running lean , whats the afr? please tell me you have an afr guage?

well i do have a wideband but its not hooked upright at the moment wait on new o2 from innovate. the plug didnt look too bad they were a lite grey when i pulled them today but in not for sure if thats to lean. i know they run suposed to be a litte brown i believe?

[04CHASE]

yes whiter is lean so thats not good. might want to do a leak down test to make sure you didnt burn a hole in your piston. and dont go wot unless your sure your afr is in the 11.x

[shawnss]

yes whiter is lean so thats not good. might want to do a leak down test to make sure you didnt burn a hole in your piston. and dont go wot unless your sure your afr is in the 11.x

k well i will do a leak down test tomorrow. i hope i havnt burnt anything up. i dont daily drive the truck at all i have put maybe 400 miles on the fresh motor. i havent drove the truck hard still breaking it in. the only bad thing is that i live in montana and there isnt any tuning around here at all. i guess im going to go with a mail order if possible. but i know this isnt the form to talk about mail orders.

[zippy]

Sounds lean for sure. Poor timing curve can cause high EGT's, but lean is the worst for that. Yes, you need some tuning work.

[shawnss]

Sounds lean for sure. Poor timing curve can cause high EGT's, but lean is the worst for that. Yes, you need some tuning work.

well i got my o2 senser in today i hooked up the wide band and at idle its at 14.5 good. but when i start to step into it at fool boost 6 psi its at 14.5 to 14.8. not good i guess that explains y the truck fills like it has hit a brick wall when i give it any gas.

[zippy]

Sounds like you have found your problem. Just a little bit of work and you should be close enough to make some power with it.