98 Prelude Misfire and blown battery fuse
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98 Prelude Misfire and blown battery fuse
Hey everyone I'm new to the forum so lmk if there's a thread for this already.
I bought a non running 1998 prelude and diagnosed the 100amp main battery fuse was blown. I put a new one in and the more I drove it the worse it started missing. All electronics cut in and out and all lights on the dash start flashing and eventually any amount of gas makes the car misfire and blows the fuse again.
I'm going to test compression and change the plugs and wires to see if anything changes but I'm not sure why a misfire would cause the battery fuse to blow.
I bought a non running 1998 prelude and diagnosed the 100amp main battery fuse was blown. I put a new one in and the more I drove it the worse it started missing. All electronics cut in and out and all lights on the dash start flashing and eventually any amount of gas makes the car misfire and blows the fuse again.
I'm going to test compression and change the plugs and wires to see if anything changes but I'm not sure why a misfire would cause the battery fuse to blow.
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Re: 98 Prelude Misfire and blown battery fuse
I haven't scanned it yet. I don't think there are any because the cel is not on and the bulb isn't burned out.
I'll scan it when I get to my garage later today.
I'll scan it when I get to my garage later today.
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From: Kuopio, Finland
Re: 98 Prelude Misfire and blown battery fuse
If maintenance history is unkown
Originally Posted by TimiK
quick what to do list
usually these things fix bad idle or/and hesitations:
- new spark plugs & wires
- new distributor cap & rotor
- new air/fuel filters
- clean injectors/iacv/egr/fitv
- bleed the coolant
- new pcv
- adjust valves and ignition
- adjust idle from tb's screw and throttle cable
- check does sensors work properly: map, iat and tps (and try calibrating tps)
- then check wires, connectors and hoses, check grounds
- check ICM and ignition switch (there was 5th gen repair call for this also)
-check o2 sensors and vacuum/exhaust leaks (check all the seals - IM/header/TB gaskets, injector seals, maybe even buy valve cover gasket set...)
-check timing. after that: double check timing
-is engine light on? check error/engine light codes
-clogged cat might you give some trouble as well (usually when driving) - check cats condition
if none of these seem to work - do compression and leak tests
and if you have chipped ecu and youre running it just with basemap, it might not work as well than properly tuned one
those are basic maintenance as well.
usually these things fix bad idle or/and hesitations:
- new spark plugs & wires
- new distributor cap & rotor
- new air/fuel filters
- clean injectors/iacv/egr/fitv
- bleed the coolant
- new pcv
- adjust valves and ignition
- adjust idle from tb's screw and throttle cable
- check does sensors work properly: map, iat and tps (and try calibrating tps)
- then check wires, connectors and hoses, check grounds
- check ICM and ignition switch (there was 5th gen repair call for this also)
-check o2 sensors and vacuum/exhaust leaks (check all the seals - IM/header/TB gaskets, injector seals, maybe even buy valve cover gasket set...)
-check timing. after that: double check timing
-is engine light on? check error/engine light codes
-clogged cat might you give some trouble as well (usually when driving) - check cats condition
if none of these seem to work - do compression and leak tests
and if you have chipped ecu and youre running it just with basemap, it might not work as well than properly tuned one
those are basic maintenance as well.
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Re: 98 Prelude Misfire and blown battery fuse
Thanks for the response! I would normally go through these steps if it was just misfiring but it's not. It's missing because of the electronics cutting in and out.
I tried diagnosis today and there are no codes because the computer keeps getting reset from the battery fuse blowing out. I replaced the battery fuse for the 3rd time after doing plugs and wires and the fuse blew again from cranking the engine.
I'm thinking ignition timing but I'm not a Honda guy and my more experienced Honda friends say it's kind of hard to mess that up.
I tried diagnosis today and there are no codes because the computer keeps getting reset from the battery fuse blowing out. I replaced the battery fuse for the 3rd time after doing plugs and wires and the fuse blew again from cranking the engine.
I'm thinking ignition timing but I'm not a Honda guy and my more experienced Honda friends say it's kind of hard to mess that up.
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Re: 98 Prelude Misfire and blown battery fuse
I think the alternator is shorting out because the battery stopped charging. I pulled every fuse that didn't involve starting and charging and it was still freaking out so I think that has to be it. I'll disconnect it and see if that's it.
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Re: 98 Prelude Misfire and blown battery fuse
It was the alternator. The positive side broke off and was sparking against the casing. Thanks for everyone's help and suggestions.
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