Need some Help
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11 Second Club
Joined: May 2002
Posts: 710
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From: Peoria, AZ
Need some Help OK... My car has over 121,000 miles on it and I have recently installed a TR 220/220 114 LSA, Comp 918's springs, Ported Oil Pump and a 255 lph Walbro Fuel pump, "NO Tuning Yet". and the car seems to be acting up, but only in the last month. It seems to serge when I get on it. Could My Injectors be going bad?
Describe Surge when getting on it.....
-surge-
Bogg down first??? bucking???
-get on it-
lead footing or WOT hammer down???
new pump???
might just be too much fuel... and injector pulse time might need to be adjusted-----meaning get a tune
-surge-
Bogg down first??? bucking???
-get on it-
lead footing or WOT hammer down???
new pump???
might just be too much fuel... and injector pulse time might need to be adjusted-----meaning get a tune
I had a similar problem a couple of months back....
mine ended up being bad o2 sensor.....
maybe same for you..when was the last time you changed the o2's??? tyypically around $60 each...give or take depending on brands and locations...
mine ended up being bad o2 sensor.....
maybe same for you..when was the last time you changed the o2's??? tyypically around $60 each...give or take depending on brands and locations...
O2s play a part in transitioning to WOT, and that's where he is having trouble. If the LTFTs are screwed in the cell he's operating in at the time he stabs the gas pedal, it'll stumble.
If it ran great when he initially nailed it, then fell flat on it's face at higher revs, I'd go with fuel pressure diagnostics.
If it ran great when he initially nailed it, then fell flat on it's face at higher revs, I'd go with fuel pressure diagnostics.
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Some things to check...
-Throw a fuel pressure gauge on there and watch it on a WOT run. You might see fuel sloshing away from the fuel pickup or maybe the fuel line is cracked.
-use a scanner and watch your factory O2s at WOT. No they are not really accurate at WOT, but if they fluctuate too much you know you probably have a spark/fuel problem.
-check your plugs/wires
-Get tuning.
-Throw a fuel pressure gauge on there and watch it on a WOT run. You might see fuel sloshing away from the fuel pickup or maybe the fuel line is cracked.
-use a scanner and watch your factory O2s at WOT. No they are not really accurate at WOT, but if they fluctuate too much you know you probably have a spark/fuel problem.
-check your plugs/wires
-Get tuning.
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