Ignition break up after 12psi - ?? - >>
#1
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Ignition break up after 12psi - ?? - >>
Typically run 18psi on pump. Been running fine for a few years. Started breaking up around 12-13psi. Feels like misfires which is why I am thinking ignition break up.
Replaced plugs, same results.
What is the next logical problem. dizzy, ignitor, plugs?
thanks
-platinum
Replaced plugs, same results.
What is the next logical problem. dizzy, ignitor, plugs?
thanks
-platinum
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Re: Ignition break up after 12psi - ?? - >>
Check the cap, rotor, and wires. It's always good to have a fresh cap and rotor every so often anyway.. If that doesnt fix the problem, coil and ignitor next. Unless it's possible you put some questionable fuel into it..
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Re: Ignition break up after 12psi - ?? - >>
i had a simalar problem when id start to build higher boost my headgasket blew between cyl. 2 and 3 it ran fine just driven normal but if i got on it it would miss might check compression, just a thought
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Re: Ignition break up after 12psi - ?? - >>
Check the gap on your pick up in the distributor, I have had same problem in past and tightened gap in distributor and problem went away. I always thought it was a boost issue but it was a rpm issue. For a test you could take your car up to redline without hitting boost and see if it breaks up at all.
#6
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Re: Ignition break up after 12psi - ?? - >>
Taking the car to redline (9500) does not break up out of boost. Plug gap is at .028, I typically dont need to go lower unless I run high boost. Do you think I should try .022?
I will look into the cap and rotor. It has been around 6,000 miles since I replaced it. I havent blow a headgaset in a while so wouldnt surprise me. I will check comp and leakdown and report back.
thanks
-platinum
I will look into the cap and rotor. It has been around 6,000 miles since I replaced it. I havent blow a headgaset in a while so wouldnt surprise me. I will check comp and leakdown and report back.
thanks
-platinum
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#8
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Re: Ignition break up after 12psi - ?? - >>
Taking the car to redline (9500) does not break up out of boost. Plug gap is at .028, I typically dont need to go lower unless I run high boost. Do you think I should try .022?
I will look into the cap and rotor. It has been around 6,000 miles since I replaced it. I havent blow a headgaset in a while so wouldnt surprise me. I will check comp and leakdown and report back.
thanks
-platinum
I will look into the cap and rotor. It has been around 6,000 miles since I replaced it. I havent blow a headgaset in a while so wouldnt surprise me. I will check comp and leakdown and report back.
thanks
-platinum
#9
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Re: Ignition break up after 12psi - ?? - >>
I forgot to post the results.
Anyway, cap and rotor let it go to about 14-15psi. After taking the gap to .024 it is back to normal. I think it was a combination of cap, rotor and plugs. They all looked fairly bad.
thanks for the suggestions..
-platinum
Anyway, cap and rotor let it go to about 14-15psi. After taking the gap to .024 it is back to normal. I think it was a combination of cap, rotor and plugs. They all looked fairly bad.
thanks for the suggestions..
-platinum
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Re: Ignition break up after 12psi - ?? - >>
i have just about the same problem mine just wont go pass 4000 rpm's i got new wires and new dizzy will be here monday so i know thats the problem..**** son im from columbus, im taken my hatch to get tuned thursday at slow motion..
Last edited by ctr32; 07-26-2009 at 06:05 PM.
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Re: Ignition break up after 12psi - ?? - >>
tight gap is key in running higher boost/hp on stock ignition system.
i ran .020 gap making 425hp and 18 psi boost on some bkr7e's. never had a problem
i ran .020 gap making 425hp and 18 psi boost on some bkr7e's. never had a problem
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