Car stumbles between 900-1100 when cold
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Supreme Member
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Joined: Jan 2000
Posts: 3,968
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From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
Car stumbles between 900-1100 when cold
If I start the car is will stumble for the first 5 minutes when its cold, but after that runs great. Any suggs?
Member
Joined: Mar 2001
Posts: 161
Likes: 2
From: Illinois
Car: 85 IROC
Transmission: 700 r4
first thing you should do is check the ECM for any stored trouble codes. jumper pins A&B together at the diagnostics terminal. turn your ignition on but dont start the car. watch your check engine light, it will flash once, pause, flash twice = code 12. this tells you it is in self test mode, it will flash 3 sets of each stored code.
[This message has been edited by bottledpower (edited March 30, 2001).]
[This message has been edited by bottledpower (edited March 30, 2001).]
Thread Starter
Supreme Member
iTrader: (8)
Joined: Jan 2000
Posts: 3,968
Likes: 1
From: Macedonia ,OH
Car: Formula
Engine: 6.0 LSX
Transmission: 4L60E
Axle/Gears: 9 Bolt 3:27
No codes or anything. this started after the intake and injector project. No vacume leaks. O2 is good at 010-840. Idles straight at 550. Timing is at 8* and TPS at .54. No ses light or anything. I'm thinking maybe MAF
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89 FORMULA 350 Edelbrock Cat-Back ,March Pulleys,Super Coil,MSD 6AL ,Edelbrock TES's, AFPR ,Shiftkit, Edelbrock Base ,AS&M Runners, Edelbrock Waterpump, ,Crane Gold 1.6 RR's, BBK 52mm TB , MSD 22# Injectors ,Hoping for 13.5
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89 FORMULA 350 Edelbrock Cat-Back ,March Pulleys,Super Coil,MSD 6AL ,Edelbrock TES's, AFPR ,Shiftkit, Edelbrock Base ,AS&M Runners, Edelbrock Waterpump, ,Crane Gold 1.6 RR's, BBK 52mm TB , MSD 22# Injectors ,Hoping for 13.5
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