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I just finished the update with my fuel flow. I removed the sending unit/pick up. I did not have to drop the tank but it was tight. I attached photos of the filter sock. You couldn’t see any light through it at all. Thanks for your help. Car run stronger and fuel pressure is stable.

Thanks for your reply. The pump is much lower than the tank. When the car is running you can see the fuel filter is only 1/4 full and you can see slow flow entering the filter. When shut off it takes over night to fill back up above the center of the filter. Another thing that is pointing me to...

Has anyone installed an electric fuel pump to stock fuel lines under 81 tank? Will the fuel feed strong enough? My feed seems erratic and slow viewing the clear filter before a Holley MitiMite. think it may be a partial plugged tank sending unit filter/strainer? Filter bowl empties and...

I am seeing most high flow cats do not require the air tube when shopping to replace my 1981 Corvette CAT. Can the AIR line at the stock converter be capped off safely?

When changing the cat, can the AIR line be plugged or will the pump be damaged> New cats do not have air tube access points.

Has anyone out there modified their 1981 to EFI? How did it interact with the factory ECM? Can parts of the ECM functions be unhooked and handled by the EFI controls? The MSD Atom 2900 carries a C.A.R.B. EO # D-722 number and may be legal to install. Atomic 2900 Atomic EFI Master Kit...

Pump has return feature and line is clear I have been tracking this problem for 3 years. The pump was changed in a fix effort. Proper GM pump with return. Return line clear. Will update if this works...or not. I know a lot of folks who have vapor lock problems. Quite a few C3 late models...

Vapor lock came back...Adding electric fuel pump and return line regulator...Dealer analyzed. See this link for reliable info on vapor lock. Ask Away with Jeff Smith: Understanding Vapor Lock--and How You Can Fix It! - OnAllCylinders Will update with outcome.

Can anyone help with pointing out a good tester for pain thickness on a corvette?

Vapor lock came back...Adding electric fuel pump and return line regulator...Dealer analyzed. See this link for reliable info on vapor lock. Ask Away with Jeff Smith: Understanding Vapor Lock--and How You Can Fix It! - OnAllCylinders :happyanim:Another success story. Well, Not So Much I had...

:happyanim:Some of you may recall my posts regarding problems with my oil pressure reading on my 1981 stock Vette. I want to thank all of you who answered with ideas. Here is the history and a final fix. Installed a new GM Restoration oil pressure gauge and the new one solved a nagging...

Not pressurized The tank was not pressurized...gravity flow.

While working on my fuel system, I found that when I disconnected the fuel outlet (to carb) fitting at the pump, a large volume of fuel ran out until I plugged the line from the tank at the inlet side of the pump. Not just what was in carb line, but solid flow. Is this supposed to happen or...

Stock factory pump There are two in and one out.

I am having problems with vapor lock on my vehicle after driving in warmer weather and parking for a short (20-45 min.) time in the sun, the car starts fine and will drive for about 30 seconds before stalling. No fuel observed from primary jets when actuating the throttle linkage and...

I am wondering how one could test the proper operation of the aux cooling fan. I cannot recall it ever coming on. Even on hot days.

It is 23,000 More than you think... Previous owner had car for over 30 years and put only slightly over 1000 miles on it. All data backed up titling and registration info. Milage documented. All numbers matching (including alternator). No zurk fitting on universals. Original hoses had to...

I have a 1981 Corvette. Factory stock. 23,000 true miles. I have had a continuing problem with the oil pressure reading on my car. The problem is that when I first start the engine to idle, the pressure gauge reads a bit below 20. After about 5 minutes, it pops up to just below 40, on its own...

When I start my engine the oil pressure reads just below 40 and in about 1 minute it jumps up over 40 and goest up and down with rpm...buy not over 50. I checked the connection and reseated it but no change. Is it the sending unit?