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Badddd misfire.

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Old Aug 20, 2014 | 11:07 AM
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Default Badddd misfire.

Hi all new user.
Just bagged myself a cheap bugeye 2002 wrx.
Massively unloved is the car.
Quite a few problems to get work on.
First being a bad misfire under load between 3-5k, car drives spot on if taking it easy. Any help is much appreciated.
I have ordered an obd lead. But also could do with software for win 7 ultimate pls. Thanks.
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Old Aug 20, 2014 | 12:49 PM
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Hi Paul,

Sounds like your doing the right thing getting diagnostics equipment to start with rather than throwing parts at it, though if it's been neglected the plugs wouldn't be a bad place to start, any idea when they were last changed? You'll probably want to put news ones in it regardless so may as well change them
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Old Aug 20, 2014 | 12:58 PM
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Hi Paul,

have a look at my recent threads, maybe the suggestions will be helpful.
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Old Aug 20, 2014 | 01:01 PM
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Yeah plugs on order pal. Just bought from a dealer p ex to clear. Massively unloved though. They had no details on service history full stop so all will eventually get done. Gonna try n pull plugs out see what state they r in while I await mine turning up.
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Old Aug 20, 2014 | 01:21 PM
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I have the same issue. I've swapped the coil and leads but problem is still there. Just the small matter of swapping the plugs out...
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Old Aug 20, 2014 | 02:34 PM
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Aye keep us posted how ya get on with it floyd
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Old Aug 20, 2014 | 02:35 PM
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I've had a few people suggesting
Knock sensor but I won't know till I can get the fault codes read.
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Old Aug 20, 2014 | 03:49 PM
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No problem,

I went;
clean out air filter;
clean out EGR/PCV valve;
clean out the egr pipework;
check for air/vacuum leaks;
check engine earth straps;
change plugs, gapped at 0.7mm - check them.
change cam sensor;

Reset ECU - NASIOC has a post on a fast relearn trick for after the ecu is reset.

Read fault codes and go from there.
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Old Aug 20, 2014 | 04:10 PM
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Yeah at pretty much on the same route at this moment
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Old Aug 20, 2014 | 06:12 PM
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So I've had a clean up. Removed plugs with checks and coil leads all seems fine in good condition. Problem is I've made it worse. FS lol.
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