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Author Topic: dead cylinder #2, has spark.. halp!  (Read 3683 times)

marcj

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dead cylinder #2, has spark.. halp!
« on: August 08, 2009, 10:08:42 AM »
alright, so I had inline resistors which have worked fine up until the latest revision. I got the new setup finished yesterday, but to my dismay, the fucker only runs on 3 cylinders.

#2 cylinder spark plug pulled doesn't change the idle, the rest do; checked spark and it's good.. checked resistor wiring and it is still connected (soldered). Can these things go bad?

I'm about to go check continuity, and injector #2 pin wires near the ecu..

any advice?
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marcj

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Re: dead cylinder #2, has spark.. halp!
« Reply #1 on: August 08, 2009, 10:18:31 AM »
btw, i have swapped out injectors, so i'm pretty sure the injectors are fine
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onlyflash944

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Re: dead cylinder #2, has spark.. halp!
« Reply #2 on: August 08, 2009, 10:42:46 AM »
resistors can burn up, multifunction volt meter is your friend
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You read some forums? nbspnbsp Cool, I tune cars.

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marcj

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Re: dead cylinder #2, has spark.. halp!
« Reply #3 on: August 08, 2009, 11:02:26 AM »
I have one, and have tested the resistance on each injector plug.. all respond the same.

I get nothing with the ECU unplugged (obviously).. i'm starting to think my ECU took a crap
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marcj

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Re: dead cylinder #2, has spark.. halp!
« Reply #4 on: August 08, 2009, 11:07:50 AM »
I'm getting a solid CEL even after I took my jumper wire out of the DTC plug, so I'm thinking the ecu took a dump.. maybe the injector driver?
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onlyflash944

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Re: dead cylinder #2, has spark.. halp!
« Reply #5 on: August 08, 2009, 11:13:30 AM »
test with a known good one
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You read some forums? nbspnbsp Cool, I tune cars.

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buk9tp

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Re: dead cylinder #2, has spark.. halp!
« Reply #6 on: August 08, 2009, 12:29:36 PM »
Quote from: marcj on August 08, 2009, 11:07:50 AM
I'm getting a solid CEL even after I took my jumper wire out of the DTC plug, so I'm thinking the ecu took a dump.. maybe the injector driver?

what i did was swap injector plugs just to be 100% sure its the injector wiring...

then just ran a wire straight from the ecu to the injector..

solid cel for fried ecu but the only problem is one injector doesnt fire?

idk. wierd...
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marcj

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Re: dead cylinder #2, has spark.. halp!
« Reply #7 on: August 08, 2009, 02:51:21 PM »
i'm swapping the whole engine harness tomorrow, and testing the ecu on a scott evans car.
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TheMadScientist

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Re: dead cylinder #2, has spark.. halp!
« Reply #8 on: August 13, 2009, 01:01:49 AM »
I would swap out the ecu with a known good ecu to check it.
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