The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 86 Scottsdale

Dead Parrot · 11-26-2020, 07:33 AM

Pull a couple of the 'easy to get to' plugs and inspect. If they are still wet with gas after sitting overnight, you have found your problem. Verify the gap is set to .045.

If you manually operate the throttle while looking down the carb, you should see gas squirt into the openings. This is from the accelerator pump and is a quick test for "Gas in the Carb". This is a NOT while cranking test.

2nd the thought that this current problem sounds like a timing issue. It doesn't take much slippage of the distributor to go from running nice to no start. Another quick test - can you move the distributor as it sits, without loosening anything? You shouldn't be able to.

If you do plan on opening the carb, get one of the gaskets for the top in case you damage the one on there during your inspections. While the top is off, check the jet sizes so you will know what is in there for later tuning efforts.

Download the manual for that carb and read up on setting the float levels. They are often wrong out of the box. Too high a level can lead to flooding.

11-26-2020, 07:33 AM	#9
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,485	Re: 86 Scottsdale - No start Pull a couple of the 'easy to get to' plugs and inspect. If they are still wet with gas after sitting overnight, you have found your problem. Verify the gap is set to .045. If you manually operate the throttle while looking down the carb, you should see gas squirt into the openings. This is from the accelerator pump and is a quick test for "Gas in the Carb". This is a NOT while cranking test. 2nd the thought that this current problem sounds like a timing issue. It doesn't take much slippage of the distributor to go from running nice to no start. Another quick test - can you move the distributor as it sits, without loosening anything? You shouldn't be able to. If you do plan on opening the carb, get one of the gaskets for the top in case you damage the one on there during your inspections. While the top is off, check the jet sizes so you will know what is in there for later tuning efforts. Download the manual for that carb and read up on setting the float levels. They are often wrong out of the box. Too high a level can lead to flooding.