LUVTruck.com

Sometimes but not all the time when i shut my truck down (turn key off) the engine will still try to turn over until i kill it with the clutch. not sure if its harmful. I dont have a way to set the timming since the PO removed the balance and did not set it back to TDC or wherever it was needing to be. Any help appreciated. Also I finally found a liftgate for my early series bed im stoked primer and paint his weekend. best part was i got it for free haha

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

It is called dieseling..it can be a timing issue or a fuel issue.Most likely timing.

yeah thats what i figured. once my nova is on the road this summer ill pull the engine out of my luv and figure out the timming issue. Right now its my only vehicle i can afford to drive. Its a brand new fuel pump so i dont think its fuel related although i never had this problem until I changed to the weber carb and with that a fuel pump that pumps 2-3.5 psi. At first i thought it was a vacuum leak but couldnt find anything. So ill have to set the balancer back to TDC and see if i can time it right. I can time it by ear really close but i guess its not close enough.

Could it be a bad timming chain or gear?
thanks for the info cleaver

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

Well since it started doing this after you changed the carb. I would guess it is fuel related, not timing. If the idle is too high, it can diesel at shut down. Maybe just try lowing the idle a bit.

It's not hard to live with either. I used to just let the clutch out a touch (slight drag on clutch) while turning off the key, and it would not diesel, and just shut off like it was supposed to.

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OK, I'm over it. Where's the beer?

Your stock LUV carb had an anti-dieseling solenoid in it to prevent this very thing- when the ignition was turned off the solenoid shut off fuel into the carb. The new Weber doesn't have one.
Try retarding the timing just a bit, which should also slow the idle. Your fuel pressure could also be a bit high, if you have a pressure regulator turn it down a bit, say to 2psi, see if that helps & the truck still runs OK.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.

It's true that you no longer have a "run on" solenoid to prevent this. I have found that if you advance the base timing from 6 BTDC to about 10 BTDC will help and maybe correct the dieseling problem. When you do this the idle will speed up a bit, then you slow the idle back down with the carb speed adj screw. This will further close the throttle thus chokeing off the air supply. Give this a try.

well the alternator i have just took a dump on me im pretty sure. seemed like my fuel pump quit working it would fire over but when i gave it gas it would die. really sucks breaking down on seattles freeways in mid traffic. thought it was the fuel pump but its brand new the GEN light was on so im sure its the alternator. so i got a new alternator but the shitty part is i have to ogger out the bottom support holes thus terminating the lifetime warranty.

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

If you ever have to do the warranty thing, I bet they wouldn't even notice.

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OK, I'm over it. Where's the beer?

thats what i was figuring they wouldnt at least not enough to hand me a new one. Changed the alternator problem solved.

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

wait... so your 'timing' issue turned out to be a bad alternator? could a timing issue be solved by loosening/tightening the alternator belt? <I've got a smog pump but it's disconnected from the bunch. (they dont NEED to be hooked up right?)> I think I'm having a similar problem, I was running just fine after I put the new carb on, but i was getting some 'dieseling' effects, turn off key, keeps wanting to run, after a month or so of that, now I can't get it to turn over. new fuel pump, seen here. viewtopic.php?f=5&t=24751
background: I installed a new alt in Kansas, and didn't have any problems with hiccuping or rough riding till roughly utah/idaho, since then nursed it to Seattle, new fuel filters, new points, new plugs, new cap n rotor too if memory serves me. Had the carb rebuilt and then a shop timed everything up for me. Was running GREAT! after a couple weeks/month noticed the wanting to keep running thing. and here I am... baffled. I knew i should have taken a car shop class in high school

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Chevy LUV: The Jesus of Trucks.

it turned out to be fuel. If i put reg. unleaded in it diesels but if i used high grade it wont. The only problem i am having is getting it to start after sitting for a few hours. It seems to me that the fuel in the fuel line drops back into the tank so I almost have to start it dry? until i crank it 3-4 times and pump the gas to get the lines plumbed up does this sound like a relevant diagnosis?

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

I'm having a prof. look at mine, luckily I'm owed favors for such things it would seem. Sounds like perhaps we have different problems. I just don't know yet. I could have either timing issues or maybe a faulty distributor or i guess it could be fuel too, but I put some lukas additive in there, so that should raise the octane I would think... sigh, I'm starting to wonder if I'm not knowledgeable enough to own a luv Seems like she always has one issue or another, and half of the stuff under the hood is rebuilt/new. money pit anyone?

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Chevy LUV: The Jesus of Trucks.

I have this issue on my 4X4 with a Weber. If it sits a day or two it loses it's prime I guess. I haven't looked into a fix yet though. I just live with it. But my fuel pump will only run when the eng. is running with the key in the on position. It won't run when the starter is running, so I just ran a hot wire of my off road lamps up on the roll bar. I plug it it in for a minute or so, start the truck, and then unplug it. Redneck, I know, but it's not a daily driver right now so it works for the weekend drives.

I did look on E bay once about a fuel check line check valve. They do have them.

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OK, I'm over it. Where's the beer?

I was smelling gas lately when driving my truck. Accelerator pump was leaking. Changed it, and now it's holding it's prime longer.

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OK, I'm over it. Where's the beer?

this is a weber?

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied

Yes it is.

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OK, I'm over it. Where's the beer?

i can smell gas often when she first starts but i dont see a leak

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1980 Chevy LUV 4x4 Weberfied Sold
1974 Chevy LUV 4x4 Weberfied