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Unread 06-05-2008, 11:15 AM   #1
farmboy1976
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Engine problems everything looks right but won't run

Okay everyone would love some help on this one, my jeep was running no problem a few days ago now it turns over fine, it is getting fuel to the carb, the spark plugs have spark, it appears to have compression.

Any body have any ideas, even when I spray carb and choke cleaner directly into the carb it won't run. But it will crank up like there is no tomorrow.

Please help, or let me know what a good EFI engine is that I could direct swap with .

Thanks all for any help.

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Farmboy1976 (1987 Wrangler)
3.5 inch 4wd Suspension lift, 33 x12.5 BF's
Replaces items since purchase: Tires, Top, Radiator, Starter, Slave Cylinder(twice), Clutch Master Cylinder, Lots of hoses, Ring Gear, Clutch, Rebuilt Starter, Water Temp Gauge, MC2150 carb, nutter bypass, Electric choke, TFI Distributor, replaced power steering box, Smittybilt front seats
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Unread 06-05-2008, 11:18 AM   #2
rustywrangler
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Hmmm, you have spark but is it a "good" spark... Have you checked voltage at the coil, batt????
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Unread 06-05-2008, 12:20 PM   #3
Jeeeeeeeeeeeeep
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If it is a stick try dragging behind a truck with it in second gear. That's what I had to do to get the 91 that I bought to kick off. It sat for 6 years and would not start even with fuel and spark, until I dragged it behind a truck, it popped right off that way and ran perfect after that. Maybe give it a try.
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Unread 06-05-2008, 02:24 PM   #4
Fernando
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I'm not sure I understand.. even if you have spark and fuel the car may not run... maybe it is not firing on all cylinders, maybe fuel pressure is dropped and your pump is bad, it starts but has no power to run... maybe your distributor got loose and the timing is off

Maybe if you give a little more info on the problem we can help better
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Unread 06-05-2008, 03:04 PM   #5
zeus87gn
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Quote:
Originally Posted by farmboy1976
Any body have any ideas, even when I spray carb and choke cleaner directly into the carb it won't run. But it will crank up like there is no tomorrow.
I have an idea, but would you please explain this statement with a little more detail?
I get the starter is turning the motor over, but what does it sound like?
Does it sound like it's trying to start but just can't quite make it?
Or is it just turning over like it always has?

It may just be flooded.
Try starting it with your foot pushing the gas pedal to the floor.

How old is your coil?
Has the engine ever just shut off on you for no reason?
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Unread 06-05-2008, 03:09 PM   #6
ionakana
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sounds like the timing may have jumped.
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Unread 06-05-2008, 03:11 PM   #7
cfJeep19
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Like the others, I'd look at the timing. You need to rule out the obvious first.
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Unread 06-05-2008, 05:07 PM   #8
farmboy1976
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OKay here is more info

Tried putting gas right in the carb and it just turns over like it normally does before it starts, trying spraying carb and choke cleaner directly into carb an it still would just turn over but never start. Pulled the spark plugs and they smell like gas but appear to be dry as if they are firing.

The timing may be something to check, I think I will try the pull start as well and see what happens.

Thanks for suggestions, let me know if you need more info from me on this one.
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Farmboy1976 (1987 Wrangler)
3.5 inch 4wd Suspension lift, 33 x12.5 BF's
Replaces items since purchase: Tires, Top, Radiator, Starter, Slave Cylinder(twice), Clutch Master Cylinder, Lots of hoses, Ring Gear, Clutch, Rebuilt Starter, Water Temp Gauge, MC2150 carb, nutter bypass, Electric choke, TFI Distributor, replaced power steering box, Smittybilt front seats
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Unread 06-05-2008, 05:32 PM   #9
yjcrawlr
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check your spark plug wires and make sure they are in the correct order. If you had them mixed up you would have spark but at the incorrect time and it would never start. If not I would suspect the timing. I would throw a timing light on it before you pull the distributor.
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Unread 06-05-2008, 06:44 PM   #10
93jeepyj
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pull the dist cap and have someone crank the motor to make sure the rotor is spinning I had the dist gear strip out on me and got the same results
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Unread 06-05-2008, 07:45 PM   #11
laybackman
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First off if the spark has no high voltage then your coil is NG. Assuming you have a good coil;Pull the dzzy cap. Have friend turn key to start. If the rotor don't move either dizzy gear is stripped or timing chain is busted. If it does move you need to check to see if this motor has timing issues.
Pull #1 plug and stick finger in the hole. Have your buddy, using large socket and long bar, slowly bring motor up to TDC on the compression stroke. You will feel a whoosh of air and pressure on your finger in the #1 plug hole as it is coming up onto TDC. Now slowly bring the piston up to TDC. Your timing marks and the position of the rotor pointing to where the #1 spark plug wire is in the dizzy cap should indicate that this is happening. If it isn't then you probably have jumped time.
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Unread 06-13-2008, 07:32 AM   #12
farmboy1976
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Well after a couple days with no rain FINALLY it started right up, then ran like a champ. It rained again and once again it was cranky as hell starting but I did finally get it started. So even though we had spark on the day it wouldn't start maybe not enough.

Thanks for all the post everyone until I find out what the problem is I am still keeping them all in mind.
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Farmboy1976 (1987 Wrangler)
3.5 inch 4wd Suspension lift, 33 x12.5 BF's
Replaces items since purchase: Tires, Top, Radiator, Starter, Slave Cylinder(twice), Clutch Master Cylinder, Lots of hoses, Ring Gear, Clutch, Rebuilt Starter, Water Temp Gauge, MC2150 carb, nutter bypass, Electric choke, TFI Distributor, replaced power steering box, Smittybilt front seats
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Unread 06-13-2008, 12:42 PM   #13
laybackman
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Quote:
Originally Posted by farmboy1976 View Post
Well after a couple days with no rain FINALLY it started right up, then ran like a champ. It rained again and once again it was cranky as hell starting but I did finally get it started. So even though we had spark on the day it wouldn't start maybe not enough.

Thanks for all the post everyone until I find out what the problem is I am still keeping them all in mind.
Run your engine for several minutes to verify that it is OK then shut it off. Get an empty spray bottle. Fill it with water. Spray the distributer cap with some water. Don't go too nuts with the water. Now try to get it to start. If it won't, you have isolated your problem. The cap is probably cracked or the plug wires are porous. Get a hair dryer and heat up the distributer cap to dry it out. Try to fire it up again. If it does fire up, I would slap on a new distributer cap.
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Unread 06-13-2008, 06:31 PM   #14
the_barbarian
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Quote:
Originally Posted by Jeeeeeeeeeeeeep View Post
If it is a stick try dragging behind a truck with it in second gear. That's what I had to do to get the 91 that I bought to kick off. It sat for 6 years and would not start even with fuel and spark, until I dragged it behind a truck, it popped right off that way and ran perfect after that. Maybe give it a try.
PLEASE, if you do this, have someone in the truck to stop it. or else you will have a runaway truck..
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Unread 06-13-2008, 06:37 PM   #15
the_barbarian
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OK, i was going to suggest you check your Cat, but it sounds to me like you have moisture issues instead. definitely look into your coil, dist cap, and spark cables. Cept the coil, nothing else there is very pricey, so it cant hurt to swap em anyway..
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