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post #1 of (permalink) Old 03-30-2000, 08:35 AM
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Vapor-Lock Problem?

I have a 1994 Suzuki Sidekick w/135,000 miles and it runs great, but sometimes i get a problem on coming down to a slow speed where the engine wants to die. It happens on occasion, when stopping at a light or turning corners. Problem is progressively getting worse, yesterday it quit and would not start, but after a while, maybe 10 minutes, it was okay for a short distance, then died again. After a few hours, drove it home (ten miles) and it was okay. I just changed the fuel pump, and I am changing the fuel filter today, but can anyone give me any suggestions as to where I might start to diagnose this problem? I thought it might be a fuel line blockage, but like I said, after a while, it was okay. Thanks in advance!

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post #2 of (permalink) Old 03-30-2000, 08:39 PM
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Re: Vapor-Lock Problem?

i've had very little trouble with my 89, but i do have a worn out throttle position sensor, or tps. i get a flat spot just off idle, which forces me to rev more than necessary to hook up the clutch. i don't know if that's your problem, as the symptoms are not too similar, but maybe it varies with engine temp. just some thoughts. if it is a temp issue, i'd be looking for loose or corroded grounds anywhere under the hood, just to be safe. good luck!

post #3 of (permalink) Old 04-01-2000, 04:59 AM
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Re: Vapor-Lock Problem?

Problem you describe is not vapor lock, a heat condition or low psi is
needed to induce a fuel vapor lock.

Only fuel system to motion problem that I know of is caused by a sticking
or mal adjusted carb float this can show up on long turns or repeated
sharp turns however it tends to correct itself when that particular
motion is countered or stopped. Test drive car when problem occurs do
opposite if you realize a correction this is your problem as it
is repeatable and remains same.
However you state that condition appears to be getting progressively
worse if that is true your problem is not fuel system it is electrical.
Intermittent electric problems may also be relative to car motion.
Loose ignition wiring and or partly grounded or shorted ignition wiring.
Intermittent electric problem can be difficult to find inspect all
ignition wiring and parts insure they are clean and tight including
all ECM terminations.

On bright side one good thing about intermittant "getting progressively
worse problem" is that one day it shall fail completely, makeing itself
known to you and can do repairs but it can real trying on oneself waiting
for that to happen.


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post #4 of (permalink) Old 04-03-2000, 10:04 AM
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Re: Vapor-Lock Problem?

When is the last time you adjusted the valves in your Sidekick?

Tim J

post #5 of (permalink) Old 04-04-2000, 01:01 PM
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Re: Vapor-Lock Problem?

Is the sidekick an auto or manual tranny? If auto, then i have had experience w/ a similar problem in another vehicle where the electrical component controlling the tranny was faulting and causing a condition similar to letting the cluth out while stopped or slowing and in gear (causing engine to die). This would happen as I came to a stop, slowed to turn a corner, etc, and it would die b/c the "clutch" was out. I too replaced all fuel filters, plugs, wires, etc, when all it needed was an inexpensive micro chip replaced.

just an experience I had...hope it helps...

post #6 of (permalink) Old 04-05-2000, 10:19 PM
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Re: Vapor-Lock Problem?

Thanks for all your suggestions everyone!--haven't had the problem lately, but we will see-- Aggie, it sounds exactly like the problem you were having, except mine is a manual tranny-- but that one time it died completely! (maybe it's not interrelated) Tom

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