Timing or fuel issue
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Joined: Jul 1999
Posts: 347
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From: Marshall,IL
Car: 82 & 91 Firebird
Engine: 400 & 355
Transmission: TH350 & 700
Axle/Gears: 4:11 & 2.72
Timing or fuel issue
I just finished putting a mild 355 in my daughters 91 bird. It idles great, rev's good w/o a load, Put in gear and it starts backfiring through the intake. I have checked timing, many-many times, checked for crossed wires more than 5 times. When I unplug the timing advance wire it is right on the money from where I set it @ 4BTDC. Shut the car off and plug it back in and the initial timing is @ 20+/-. I don't have an adjustable timing tight. Is the computer bad or am I missing something. Please help.
Joined: Sep 2005
Posts: 27,866
Likes: 2,428
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Timing or fuel issue
Timing is doing what it's supposed to
It's lean
Get it a pair of 350 injectors (assuming it's TBI - ???) and a 350 chip
It's lean
Get it a pair of 350 injectors (assuming it's TBI - ???) and a 350 chip
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