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rough start, backfires, timing problem?


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Old 11-03-2009, 02:38 PM
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rough start, backfires, timing problem?
hello all i just swaped from dpfi to mpfi
in my 1991 civic jdm d15b(non-vtec)
after the swap, it starts really rough and only
sounds like 2 cylinders are working
after it starts, it purrs and sputters off an on
i feel like i've literally checked everything
ignition coil, alll of my own wiring(like 30 times lol)
dizzy cap and plug placement
please any adive is greatly appreciated
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Old 11-03-2009, 05:03 PM
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sounds like its off by 2 teeth trust it just happen to me like 1 week ago ..check that and see
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Old 11-03-2009, 07:47 PM
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no cels ? bad ecu ? bad fuses or ground could cause it too probably but im not sure
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Old 11-03-2009, 08:55 PM
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Quote:
Originally Posted by DA9intefra View Post
sounds like its off by 2 teeth trust it just happen to me like 1 week ago ..check that and see
what do you mean off by two teeth?, are you talking about the dizzy rotor?

Quote:
Originally Posted by rascles View Post
no cels ? bad ecu ? bad fuses or ground could cause it too probably but im not sure
oh its throwing a 16 but i've checked the injectors multiple times
Last edited by camhasabignose; 11-03-2009 at 08:58 PM.
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Old 11-03-2009, 08:58 PM
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My bet is that it is a fuel issue.

Check fuel going to each cylinder. Unplug the injector clips while the car is running, one at a time. If the RPM drops, that cylinder was getting fuel. If there is no change, that cylinder was not getting fuel, and you wired something wrong.
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Old 11-08-2009, 10:39 AM
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okay so i ran a few tests lol
and everything seems to be working fine,
infact, after a 15 min drive on the highway,
the car just seemed to run all the problems through
and well the car runs great now,
i really appreciate all the help!!!!
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