Re: [tech] random misfire problem

[Kevin <aventari@cts.com>]

At 12:56 PM 10/26/98 EST, you wrote:
>In a message dated 10/26/98 7:52:05 AM Pacific Standard Time,
aventari@cts.com
>writes:
>
>> Yeah, the fuel pump is suspect, but i dont think it could cause misfiring
>>  like this and then supply enough fuel for the new engine to run up to
>>  7000rpm easily in 3rd. But i'll give it a try
>>  	I did check voltage at the fuel pump a few months ago, and it was around
>>  11 volts. I get 13.1 volts at the battery when the alt is charging, and
>>  12.0 with the lights on drving around. pretty low to begin with. 
>>  What I'm going to do is get some stereo power wire like Stinger 8 or 10
>>  gauge and run it to a good relay next to the pump with power directly from
>>  the battery, and switch the relay with the original power wire. 
>>  Where can I get a good weatherproof relay?? Pref. Hella?
>>  
>
>
>How about encasing it in a small weathertight box? I saw something like this
>in a Maritime catalog once while looking for block and tackle stuff. Even may
>find a weather rated relay.
>
>Here is a rethink; since it's not auto sound then maybe you'd want to keep
the
>relay inside the cabin somewhere and just run the switched power to the pump.
>By replacing the wire for a larger gauge one as you suggest it should loose
>less voltage over the run than the old wire that's been in there all this
>time. Plus you'd be replacing the contacts in there at the same time, I'll
bet
>these are some of the problem as well.
>
Yeah, I could just relay it at the fuse box, or i could just replace the
stock wire and use the original relay. hmm, where exactly does the stock
wire run to/from? I've never followed it.

>Since I'm off and running with the fuel delivery tangent then how about the
>filter(s) and pick up in the tank? Clogged? Gummy? 

the fuel filter is about 3-4 year old, I have a new one thats going on
soon. The pick up is fine.

>The air leak thing is a probable cause as well.  Any way to get this thing on
>a 'scope ?

What's a scope? how does it work?

>TBerk
>all over the map diagnosis a specialty.
>

- --
Kevin Fry .:. 81 Scirocco S -- Now with JH power!
      San Diego, CA
"If God had meant for us to use the metric system, we would've been born
with ten fingers and ten toes."
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