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Old 10-29-2012, 06:39 PM   #1 (permalink)
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Civic VX won't restart after coasting with engine off...

So, I've got a 93 Civic VX. I just did a tune up, I've only had it for about 1000 miles of driving. I am also an auto shop teacher, so I have a pretty good knowledge of cars, engines, and diagnostics, but this one is stumping me so far....

Pretty simple... I try coasting with engine off on the downhills of my 75 mile (one way) commute to work. I compression start the engine to get it going. I've done this all the time with my old/other cars. I've done this with 90% success with the VX, but on multiple occasions it has just not wanted to restart. It has occurred on long coasts (down a moutnain pass) as well as a short one (an off ramp). Of the 3 times it has happened, twice it started after a few seconds of being stubborn. The other two times I had to pull over and continue trying to start it with no luck until all of the studden it worked.

The X factor here for me is lean burn mode... I don't know a ton about it, so I am wondering if it could be related. Otherwise, any ideas?

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Old 10-29-2012, 10:45 PM   #2 (permalink)
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I'm betting you've got some other gremlin - don't think it's related to having the engine off with the car in motion.

Fuel pump relay? Famous for having intermittent problems when they start to go in some Hondas.
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Old 10-29-2012, 11:51 PM   #3 (permalink)
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I don't have the answer for you but I can tell you that I experienced something similar a couple times in my 94 VX. It seemed to only happen if I tried to EOC two times without the engine running much in between. It seemed like it would take about 30 seconds of trying to start (acted like it wasn't getting fuel) and then it would start and run fine. I thought maybe fuel pump might be going bad but it ran fine aside from that. I just made sure that if I did any EOC, that I made sure that the engine ran a bit before I did it again.
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Old 10-30-2012, 05:02 AM   #4 (permalink)
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Maybe the ignition switch could be going south? Perhaps installing a kill switch (interrupt the cam or crank sensor possibly) would help.
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Old 10-30-2012, 09:54 AM   #5 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
I'm betting you've got some other gremlin - don't think it's related to having the engine off with the car in motion.

Fuel pump relay? Famous for having intermittent problems when they start to go in some Hondas.
This very common and more so in a hot car.
main relay buried in the drivers kick panel, when the car wont start, kick the panel! repeatedly.

when you turn your ignition on the compuer send power to the relay for about 3 seconds, if you kick it within that time it will prime and start. to fix it you can buy a new one(kinda expensive) or you can take it out and resolder by adding some new solder while youre at it.

The connections that come through the circuit board develop very small cracks and quit cunducting. this is alllll over the internet with pics and how to's. good luck.
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Old 10-30-2012, 11:30 AM   #6 (permalink)
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Got this from another forum-

Quote:
Originally Posted by JohnRM
I've had this problem before. Have you tried listening for the fuel pump (it's like a little humming noise)? I've always waited for this to end and it usually takes likes three seconds. Sometimes I don't hear it engage and what I do is try to start it and turn it all the way off, then start to listen again for it. I know this is a weird way to diagnose the problem but I've successfully done this multiple times whenever its happened
My reply was-

Quote:
Originally Posted by gijoe985
I had someone else suggest that. Today I tried only key starting it. I thought I was in the clear, doing it about 5-8 times on the way to work, but then it would not start. I turned the key all the way off, pause, then on, pause, and then it started fine...

Now, what is creating it? Is it a "problem" or is it just me turning the key off and then on too quickly perhaps...
So, I'll keep you guys posted. I always like following up on my posts for people in the future who may have the same problem...
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Old 10-30-2012, 02:52 PM   #7 (permalink)
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I've briefly tested engine off coasting - my engine didn't want to be bump started either.
I had to key it on.
With the very heavy steering, no assisted brakes, and no bump starting, I gave up on EoffC .

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