Posted By: 64physhy
Need Help! Engine ran Backwards - 06/30/10 01:43 AM
I've been trying to get my carb running right on my 414 stroker for a while now. I haven't been able to get it to idle below about 2000 RPM without dying. I took it apart and blew it out, and found a couple chunks of plastic in it, so thought I found the problem. When I started it, it started right up, but still wouldn't idle below 2000 RPM, although I never got it warmed up enough to know for sure. I let it die after a couple minutes, and when I tried to start it again, the engine turned backwards for about 3 seconds...several revolutions.
The timing is locked out at 30* with a 20* start retard on an MSD E-Curve.
Carb is a Proform 750.
Compression is 10:1 with Iron Ram heads
Could I have skipped the timing chain when this happened? What all do I need to check??
Posted By: stumpy
Re: Need Help! Engine ran Backwards - 06/30/10 01:58 AM
Are you running a plastic coated timing gear. If you are then I would replace it with a metal set. Also pull your dirtibutor and check the gear on it.
Posted By: ahy
Re: Need Help! Engine ran Backwards - 06/30/10 02:14 AM
The oil pump doesn't pump oil running backwards but 3 seconds wouldn't likley be enough to hurt bearings ect.
Posted By: 64physhy
Re: Need Help! Engine ran Backwards - 06/30/10 02:24 AM
Timing gear is not plastic coated. I do have a chain tensioner, so not sure if that would matter for anything.
Posted By: Kern Dog
Re: Need Help! Engine ran Backwards - 06/30/10 05:41 AM
When I was a teenager in high school, my sisters boyfriend said that he was trying to push start a 4 speed car. He was rolling it down a hill and jumped in, shoved it ito gear then popped the clutch. The problem WAS that it was in REVERSE! He said that it actually ran, but very rough. I still think that he was lying, but I have never personally tested this out.
Posted By: Commando1
Re: Need Help! Engine ran Backwards - 06/30/10 11:03 AM
I've accidently run diesels backwards. Never heard of a gas doing that. Hey, now you have a marine engine.
Posted By: Kern Dog
Re: Need Help! Engine ran Backwards - 07/01/10 01:14 AM
Imagine 4 reverse speeds and one forward!
Posted By: dfsmopars
Re: Need Help! Engine ran Backwards - 07/01/10 02:40 AM
I had a two stroke motorcycle that ran backwards. When the rpm would drop to an idle you could hear it start to die, recover and then idle back up. Then if you wern't thinking you'd pop the clutch and over the handle bars you'd go. I know two stroke is a different animal than four stroke. Maybe this is just useless information.
Posted By: 64physhy
Re: Need Help! Engine ran Backwards - 07/01/10 04:17 AM
I tried out the other carb, and it works now. Engine still kicked backwards once before I got it started, though. Double checked the timing when I got it running, and it's at 30*. Didn't kick back as bad as before. After it did it once, I got the car started, warmed it up for about a minute or so at around 1600 RPM, then let it go down to 1000 and it idled. Now I need to figure out what the problem is with the other carb.
Posted By: Kern Dog
Re: Need Help! Engine ran Backwards - 07/02/10 01:07 AM
The motorcyxle story is friggin funny! Man, the look of surprise you must have had!
That was NOT useless information. It made ME laugh. Thank you!