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View Full Version : 98 firebird ls1 need help!!!!!! tuning



Brandon4512
February 12th, 2018, 07:36 AM
info about car.. stock bottom end ls1, btr stage 4 cam, th400, supporting mods, prc stage 2.5 243 heads, vic jr intake with accufab 4150 throttle body, 42lb bosch injectors.

need speed density tune. having problems with idle and drivability currently.

really new to gm gas tuning and would like if someone would be willing to take a look at the data log and the tune that is on the car now and give me some feed back on how to get this thing at least idling good and running. ill worrying about wot tune later.

joecar
February 12th, 2018, 02:15 PM
Set B3803 to 283 *F.

Set C6001:P0101 to Non-Emissions.

Make sure a MAF DTC shows up immediately.

Start with the stock VE tables (Main VE and Backup VE).

joecar
February 12th, 2018, 02:17 PM
Your IAT sensor is not connected (or otherwise open circuit).

Your ECT is stuck at 120 *F... you need it to get to at least 168 *F.

Brandon4512
February 13th, 2018, 09:09 AM
Joecar thank you for the reply. Me and him are going to try and get to the car tomorrow and make those adjustments and check the iat. Do you have a suggestion as to why the ect is 120? We had the car running more than long enough to get to temp.

joecar
February 13th, 2018, 01:29 PM
When you filled engine/radiator with coolant, did you bleed the air out (at the steam crossover tube)...?