misfire under hard acceleration
Thread Starter
Junior Member
Joined: May 2004
Posts: 79
Likes: 0
From: london ontario
Car: 87 iroc
Engine: mild 350
Transmission: 350 turbo
misfire under hard acceleration
car runs mean outta the hole now with my slicks i jsut got! atleast for the first gear and some of second, then it jsut goes, pop pop pop pop pop at the end of second gear or low third gear. i think that my carburetor is leaning out, and combustion chamber is getting too hot, causing a misfire? im running ac delco plugs that i jsut replaced a month ago. i have an electric stock 350 tpi pump regulated down to 4 psi, and it seems to pump alot. one guy told me that im running outta fuel, and need a 1/2 fuel line? another guy told me i need a colder range spark plug. another guy told me its jsut too hot of air/fuel, and if i run a cold air intake instead of my open element it will help cool it down. this comes and goes, did it at the beggining of the year then went away. but i have not been mkaing the power out of this motor i should be!
anyone got any ideas or heard of this?
anyone got any ideas or heard of this?
Supreme Member
Joined: Jul 2004
Posts: 1,840
Likes: 1
From: Tigard, Oregon
Car: '86 Berlinetta
Engine: 350
Transmission: 700R4
what octane gas are you using?
have you cleaned out the jets at all?
4PSI is a little low for a carb, i believe that it is supposed to be around 12 - 15PSI if memory, if you're lucky you'll just have the fuel pump that is mounted to the block (which only takes like an hour to take out)
have you cleaned out the jets at all?
4PSI is a little low for a carb, i believe that it is supposed to be around 12 - 15PSI if memory, if you're lucky you'll just have the fuel pump that is mounted to the block (which only takes like an hour to take out)
Thread Starter
Junior Member
Joined: May 2004
Posts: 79
Likes: 0
From: london ontario
Car: 87 iroc
Engine: mild 350
Transmission: 350 turbo
yes, i jsut put a new one in less then 1 k ago, so jsut a month or two ago, and i have an electric pump, so i got a containter and put the fuel line in there, then turned on the fuel for 15 seconds, and there was ALOT of fuel! we are talking like 2 small maragirine containers full, (like prolly 10 float bowls full)atleast i thought it was alot. and yes once in a while i take my carb off and blow out every hole, jets, air bleeds, anything, and thats about it, but it deosnt affect it much, and i normally run 87 octane ksue i only have 8:1 compression, but the odd time i put in 94 and i dont notice a difference in power, so i jsut never bother, and i had my fuel pressure set to 6 psi, and adjsuted to ti 4 on my regulator because i think it was abit too much pressure. didnt affect anything, not power nothing
iany ideas? could it be anyhting with my timing? i do have quicker advance springs in. but i dont think they are too quick
iany ideas? could it be anyhting with my timing? i do have quicker advance springs in. but i dont think they are too quick
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Breazlan
Engine/Drivetrain/Suspension Parts for Sale
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Sep 25, 2015 11:20 AM
1997, 350, 38, accel, acceleration, camaro, carbed, carbureted, carburetormisfirepop, hard, misfire, misfires, missfire, missfiring, popping, tpi, ubder




thanks for clearing that up air adam.
