another computer gone for crap
Thread Starter
Race Director
Joined: Mar 2002
Posts: 12,968
Likes: 0
another computer gone for crap
i keep frying my computer, the check engine light flashes quickly and the car runs like crap, when i replace it everything is ok for a while and then it happens again. wtf???
any ideas, thanks guys :cheers:
any ideas, thanks guys :cheers:
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: another computer gone for crap (atotalnincompoop)
sounds like you have a short... that will fry a computer faster than fast.
I know... I am Mr Obvious...
and I have no clue how to start looking for it. :sad:
I know... I am Mr Obvious...
and I have no clue how to start looking for it. :sad:
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: another computer gone for crap (atotalnincompoop)
Repeated ECM problems usually do come down to quad drivers as already mentioned.
Your best bet for troubleshooting is to check once the friend ECM is out. I've got a listing of different resistance values for a couple pins that contain quad driver stuff. If I get my scanner working with a USB patch under XP, I can scan it in for you. Good luck, -Matt-
Your best bet for troubleshooting is to check once the friend ECM is out. I've got a listing of different resistance values for a couple pins that contain quad driver stuff. If I get my scanner working with a USB patch under XP, I can scan it in for you. Good luck, -Matt-
Drifting
Joined: Mar 2001
Posts: 1,636
Likes: 3
From: Lafayette IN
Re: another computer gone for crap (atotalnincompoop)
Hehe...sorry.
Think of a quad driver as a glorified relay.
Some things in the ECM just use a simple transistor. Like when the fuel pump runs for the first 2 seconds, there is a transistor that acts like a switch to actually send the feed signal to the fuel pump relay in the engine compartment.
Quad drivers on the other hand are big switches. Four injectors are tied to one and 4 are tied to another. If you short out an injector clip when the engine is running, the quad driver will overheat and fry itself into a beautiful paperweight. Your injectors for that side wouldn't fire. A couple things use quad drivers besides the injectors, but "brevity is the soul of wit".
Think of a quad driver as a glorified relay.
Some things in the ECM just use a simple transistor. Like when the fuel pump runs for the first 2 seconds, there is a transistor that acts like a switch to actually send the feed signal to the fuel pump relay in the engine compartment.
Quad drivers on the other hand are big switches. Four injectors are tied to one and 4 are tied to another. If you short out an injector clip when the engine is running, the quad driver will overheat and fry itself into a beautiful paperweight. Your injectors for that side wouldn't fire. A couple things use quad drivers besides the injectors, but "brevity is the soul of wit".
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