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Thread: sputters at high rpm in 4th
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06-23-2012, 09:58 PM #1
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sputters at high rpm in 4th
the car sputters at 4000 to 4500 rpm in 4th gear only, its kind weird and i dont know what it could be? any help would be great?
Jared
1970 C10 SWB LT1 383 with LT's, 4.10 12bolt, 700R4, nitrous, various 1996 camaro parts. lol
2012 M8 Sno Pro 162
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06-24-2012, 09:39 AM #2
The FABRICATOR!
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I'm going to guess its fuel related. At that rpm in forth gear its going to have a pretty good load on the engine. Plugged fuel filter, weak fuel pump, or ecm could be pulling timing due to poor fuel quality. Going to have to datalog it to know for sure though.
Chris
1985 Monte Carlo SS
Mods: 9:1 383 LT1, Ported Trick Flow heads, D1SC Procharger, 4L80E, 3.50 9"
Check out the M122 MCSS build thread here!
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06-24-2012, 01:13 PM #3
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ok thanks. also it just feel like a dog right outta the hole. but once it hits 2000 it starts to just pull hard. i went to the track on friday and the best 60' time was 2.287. the car is all stock. could that just be a gearing thing?
Jared
1970 C10 SWB LT1 383 with LT's, 4.10 12bolt, 700R4, nitrous, various 1996 camaro parts. lol
2012 M8 Sno Pro 162
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06-24-2012, 02:08 PM #4
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Id start by looking in to what firebird said. Check plugs, wires, fuel pressure etc. Have you noticed a discernable miss at idle or throughout the RPM range?
Sent from my now unrooted but updated DROID 2(stupid updates)ALMYDOE - 1970 Chevelle - 350/TH350 soon to have LTX power with boost!!
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