G8 won’t run

Mxrider3371 · 08-27-2020, 06:48 AM

Hey guys I have a 1992 G8 gas. Started out the season with a very intermittent running issue, it would run perfect then all of a sudden it would only go 2mph back firing and smelled like raw fuel. So here is a list of brand new parts I’ve installed trying to chase the root of the problem. It’s dead in the water as of right now will turn over but won’t start. ANY HELP IS APPRECIATED

Fuel pump and filters
Fuel lines
Spark plug
Adjusted valves
Carburetor
Gas pedal stop switch
Ignition coil

slonomo · 08-27-2020, 02:58 PM

If you replaced the carb with a cheap $30 chinese Ebay carb then I'd say your issue is the carb. Those things are terrible.

cgtech · 08-28-2020, 01:29 AM

First, I agree with Slonomo on the carb. Completely disassemble the original, clean, and try it again.

Ok, that's a lot of parts to throw at a problem. What order did you do all that, and "all at once", or "one by one, with no success after each"? (Never "shotgun method" the repair, one thing at a time)

Next will be "what's the compression"? Do you have spark? Does the gas pedal actually open the carburetor lever? (This one is often overlooked, please verify). Is the airbox full of a bunch of oil, flooding the air filter? If you spray (just a little) starting fluid into the carb throat, does it briefly start?

slonomo · 08-28-2020, 07:44 AM

Quote:

Originally Posted by cgtech

If you spray (just a little) starting fluid into the carb throat, does it briefly start?

Be careful if you use Ether/starting fluid. A "one second spray" is all you need. Give it 5-10 seconds to start to evaporate. Then try it. If you spray too much and there is wet ether in the cylinder, you could have a massive explosion. Ether is several times more volatile than gasoline, and there is no oil in it (usually). If you buy a good brand it will be a "tuned down" version of the high powered stuff and it will have oil in it. Spend a good $6-$10 on a good brand of starting fluid.

Mxrider3371 · 09-01-2020, 11:48 AM

I went through the original carb and cleaned it twice myself and once a small engine mechanic also went through it. Yes I have spark. Here’s the list in order of the parts I replaced and yes I did one repair at a time trying to find the problem.

Carb cleaned 3 times jets bowls needle floats all good
Spark plug
Adjust valves
Fuel filters and lines
Fuel pump
Ignition coil
Gas pedal stop switch.

My problem started as intermittent. Normally when cold was hard to start and popped and backfired first few min then would take off like a bat out of hell only to repeat a minute later. But at times we would go days of it running totally fine, but as of now she’s DEAD IN THE WATER

Mxrider3371 · 09-03-2020, 11:51 AM

Anyone?????

slonomo · 09-04-2020, 04:09 PM

It's very difficult to diagnose an intermittent problem without putting hands and eyeballs on it. But I'll try.

In cases like this, basics are the first thing:
1. compression to spec
2. valve lash to spec
3. fuel delivery
4. spark quality
5. air quality
6. fuel quality

If you have all the basics in good order, to spec, the only thing left is timing. On some engines, timing is controlled by the CDI unit. The CDI is an electronic device that has potted circuitry inside. That potting material can expand and contract with heat/cold and can break connections inside the circuitry. We used to test control modules by putting them under a heat lamp for 5 minutes and running them through the same tests. Some CDI's can be tested. Check with your local dealer for the procedure.

Timing is also controlled by the flywheel position in relation to the crank and cam. Without disassembling the engine, one cannot verify the physical position of the engine parts.

It's also possible that some wiring on the cart might be messed up. I've seen 2 year old carts that had mice. Mice like to chew up wire insulation. When that happens, you can get shorts. Shorts will cause running issues, charging issues, starting issues....all kinds of issues.

Also, connections should be checked on all wires, cleaned, and tightened up. Corrosion happens on loose connections, especially if moisture is present. So all the wiring connections should be inspected, cleaned, and repaired if needed. I use dielectric grease on any connection that is exposed to moisture, and on a cart, it's most of them.

Hope this helps.

08-27-2020, 06:48 AM	#1
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10	G8 won’t run Hey guys I have a 1992 G8 gas. Started out the season with a very intermittent running issue, it would run perfect then all of a sudden it would only go 2mph back firing and smelled like raw fuel. So here is a list of brand new parts I’ve installed trying to chase the root of the problem. It’s dead in the water as of right now will turn over but won’t start. ANY HELP IS APPRECIATED Fuel pump and filters Fuel lines Spark plug Adjusted valves Carburetor Gas pedal stop switch Ignition coil
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10

08-27-2020, 02:58 PM	#2
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: G8 won’t run If you replaced the carb with a cheap $30 chinese Ebay carb then I'd say your issue is the carb. Those things are terrible.

08-28-2020, 01:29 AM	#3
cgtech Over This Interview Is... Join Date: Jun 2012 Location: AZ Posts: 17,449	Re: G8 won’t run First, I agree with Slonomo on the carb. Completely disassemble the original, clean, and try it again. Ok, that's a lot of parts to throw at a problem. What order did you do all that, and "all at once", or "one by one, with no success after each"? (Never "shotgun method" the repair, one thing at a time) Next will be "what's the compression"? Do you have spark? Does the gas pedal actually open the carburetor lever? (This one is often overlooked, please verify). Is the airbox full of a bunch of oil, flooding the air filter? If you spray (just a little) starting fluid into the carb throat, does it briefly start?

09-01-2020, 11:48 AM	#5
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10	Re: G8 won’t run I went through the original carb and cleaned it twice myself and once a small engine mechanic also went through it. Yes I have spark. Here’s the list in order of the parts I replaced and yes I did one repair at a time trying to find the problem. Carb cleaned 3 times jets bowls needle floats all good Spark plug Adjust valves Fuel filters and lines Fuel pump Ignition coil Gas pedal stop switch. My problem started as intermittent. Normally when cold was hard to start and popped and backfired first few min then would take off like a bat out of hell only to repeat a minute later. But at times we would go days of it running totally fine, but as of now she’s DEAD IN THE WATER
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10

09-03-2020, 11:51 AM	#6
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10	Re: G8 won’t run Anyone?????
Mxrider3371 Not Yet Wild Join Date: May 2020 Posts: 10

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09-04-2020, 04:09 PM	#7
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: G8 won’t run It's very difficult to diagnose an intermittent problem without putting hands and eyeballs on it. But I'll try. In cases like this, basics are the first thing: 1. compression to spec 2. valve lash to spec 3. fuel delivery 4. spark quality 5. air quality 6. fuel quality If you have all the basics in good order, to spec, the only thing left is timing. On some engines, timing is controlled by the CDI unit. The CDI is an electronic device that has potted circuitry inside. That potting material can expand and contract with heat/cold and can break connections inside the circuitry. We used to test control modules by putting them under a heat lamp for 5 minutes and running them through the same tests. Some CDI's can be tested. Check with your local dealer for the procedure. Timing is also controlled by the flywheel position in relation to the crank and cam. Without disassembling the engine, one cannot verify the physical position of the engine parts. It's also possible that some wiring on the cart might be messed up. I've seen 2 year old carts that had mice. Mice like to chew up wire insulation. When that happens, you can get shorts. Shorts will cause running issues, charging issues, starting issues....all kinds of issues. Also, connections should be checked on all wires, cleaned, and tightened up. Corrosion happens on loose connections, especially if moisture is present. So all the wiring connections should be inspected, cleaned, and repaired if needed. I use dielectric grease on any connection that is exposed to moisture, and on a cart, it's most of them. Hope this helps.