TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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mine did that until i found out that i had a spark plug wire that was burnt through and grouded on the header tube, but it only popped( backfired) weh i let off the gas if it was revved up a bit
<font face="Verdana, Arial" size="2">Originally posted by Cannon: I recently took my '89 out for a drive, only the second or third time this year. The last time I was out cruising I noticed something.
When I mash the peddle the engine hesitates and then picks up slowly, at this point I get some minor backfiring as well.
I just cleaned my K&N's so it's not dirty filters... Could this be bad injectors?... I have no idea.
Please help... I doubt I could take me parents Caravan at the moment. </font>
Backfires out the exuast of intake. Does it backfire at full throttle are just part. More details please.
Maybe try putting in a fresh tank of gas or fuel system cleaner. If you've driven only 2 or 3 times this year, do you still have last years gas? If so, you may have some lacquering in the lines or tank that has reduced pressure of partially clogged the injectors. Backfiring under the hood (throttle body) usually means low fuel pressure. Tailpipe backfiring is usually related to timing. Which do you have?
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1972 Corvette LT1
Keith Black 9.7:1 Pistons
Comp Cams 480/480 lift @220 Duration
Original 4 Bolt Steel Crank
1.5 Roller Tip Rockers
336 Posi Rear Chunk
1991 Speed Density TPI setup
DUI Special order Tachdrive Distributor
[This message has been edited by 72LT1VETTE (edited April 11, 2001).]
[This message has been edited by 72LT1VETTE (edited April 11, 2001).]
I had the same problem before.My problem was because I had bad plug wires(they were really crispy from hanging on the exhaust manifold) and 2 of my plugs wires were switched with eachother.So my firing order was basically messed up.Just my personal experience.
