ss.slp.ls1

iTrader: (36)

I think there is more tuning software available for the OBD1 LT1 pcm's. But I am not sure. I don't think one is considered an upgrade over the other.

1994TAguy18

iTrader: (1)

i am having the same problem with my car . i rebuilt the motor and put a small cam in and i have been checking everything and still cant find out whats wrong with it. i havent changed the opti yet but it have a new cap and rotor and i am geting spark. i scanned it and it didnt have any codes but they say it wolt because it hasnt ran long enuff or went in a closed loop yet. so if you fix it let me know.

-DIABLO-

iTrader: (1)

i fix my problem after mesing with it i check the injectors while the car runing unclip one by one to hear for any changes and found that the car was running on four injectors the fuel pressure regulator was clogged and replaced and worked fine after that i had check my fuel pressure earlier and it was reading 41 with the car off and 45 running so pressure was fine but not the fpr so check urs that might be it

sdotlog

Have you guys gotten a custom tune for the motor upgrades?

1994TAguy18

iTrader: (1)

i havnt got the car tuned yet but the guy from pcmsforless said it should run with stock tune. i have got good fuel pressure but it bleeds done after 5 sec but someone told me it proble the check valve in the fuel pump. i will check to see if every injector is working.

camerory

iTrader: (10)

Yeah, if the pressure bleeds off it could be a leaky injector, bad fuel pressure regulator, bad ball check valve in the pump, or a cracked flex fuel hose in the pump. Mine was the ball check in the pump.

Black96transam

i scanned just a minute ago and i got 5 codes... code 15, 27 29, 36, 42...

Code 15- Coolant sensor circuit-low temperature indicated. Verify engine is not under cooling, such as a thermostat sticking open. Check wiring and connections to sensor. Replace sensor

Code 27- EGR vacuum control solenoid circuit. Check the EGR solenoid wiring and connections.

Code 29- Secondary Air Injection. Check the wiring and connections for shorts.

Code 36- Distributor ignition system. Faulty high resolution (360X) pulse or multiple low resolution pulses detected. Check pigtail connector from distributor to main harness for any opens or shorts. Verify wiring is okay before replacing distributor.

Code 42- Ignition control circuit (ignition module). Check wiring and connections from ignition module and ecm. Replace module only after verifying wiring and connections are not shorted or open.

ss.slp.ls1

iTrader: (36)

That explains it...

Black96transam

what should be the voltage on the opti wires when i check em??

lt170chevelle

iTrader: (2)

is your iac stuck ?

Black96transam

whas IAC??