Backfires under load after installing flomatched injectors
02-16-2002, 05:35 PM
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Car: 89 IROC
Engine: 350 HSR
Transmission: modified 700R4
Axle/Gears: 3.42
Backfires under load after installing flomatched injectors
Idles nice but when I go to get on it backfires.Couldn't find any vac. leaks any ideas what to check next.
BD3
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02-16-2002, 09:57 PM
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Car: 04 GTO
Engine: LS1
Transmission: M12 T56
I really wouldn't blame the injectors outright here. You didn't change to 22s on the stock chip did you?
I'd guess tht a vacuum line or some connector isn't on right. Something ordinary like that would seem likely after having the plenum off.
We're still on for the track in a few weeks right. I'll be running 3.42s and who knows what else by then. I don't want to hear no excuses when i'm smokin' you, lol
I'd guess tht a vacuum line or some connector isn't on right. Something ordinary like that would seem likely after having the plenum off.
We're still on for the track in a few weeks right. I'll be running 3.42s and who knows what else by then. I don't want to hear no excuses when i'm smokin' you, lol
02-17-2002, 03:11 AM
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Car: 89 IROC
Engine: 350 HSR
Transmission: modified 700R4
Axle/Gears: 3.42
Ed I'm not blaming the injectors just noting that after swap is when the backfiring started.Would a small vac. leak not effect idle but would under load?
BD3
BD3
02-17-2002, 09:59 PM
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Car: 04 GTO
Engine: LS1
Transmission: M12 T56
Well, with MAF, a vacuum leak can sometimes cause weird ****. So definitely look for that.
I just can't help but think about something like the TPS not set or maybe even the MAF decided to start to go.
I just can't help but think about something like the TPS not set or maybe even the MAF decided to start to go.
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