Yes, to get to the fuel pump you will have to remove the gas lid and plate by removing 4 screws. Then the rubber filler will have to be removed from one corner at a time. Then you will see the fuel pump assembly top and is removed by the feed, return, vapor hoses, and connector.... then the 9 bolts hold it to the tank. There is a rubber gasket under the fuel pump assembly top and make sure you don't tear it so it can be reused. From there once all has been loosened and removed just pull the assembly out and inspect. I'm sorry I said sock and ment to say strainer. The sock is wrapped around the pump and the strainer is attached at the bottom of the pump. The strainer looks like a mesh t-shaped piece. It blocks trash from entering the pump but is not full proof...thus trash gets in the filter. It can be removed and cleaned as long as there are no tears in it, if so replace. It along with the sock will be brittle from gas over the years. The sock will be soaked in gas if squeezed. There are o-rings on the 9 bolts and will need to be replace if they are torn or old appearing and can be gotten at Nappa for about .35 each.

 

Sounds like I have my weekend planned once again. I am seriously just thinking about replacing it all since its old and will probably all go soon with my luck.

 

Doing some pricing whats the difference between the pulsator and the pulsator dampener, they look the same on napa.

http://napaonline.com/masterpages/NO...+Pump+Pulsator

http://napaonline.com/masterpages/NO...+Pulse+Dampner

 

I believe they are the same. I ordered my AC Delco fuel pump off Ebay for like $45 or so and it came with a new sock and strainer but I used my old pulsator. If you plan on going with Napa just ask them at the desk when getting the parts which pulsator is used. I also had to rewire the fuel pump with different connectors (are supplied with Delco) but they used a different connector than stock GM. Not a problem.

 

Thought I would throw this in.

https://www.corvetteforum.com/techti...=278&TopicID=2

https://www.corvetteforum.com/techti...D=97&TopicID=2

 

Ok just drove it home for lunch and put the pressure guage on and its holding 40 psi strong without the car running, if I start the car is is at 35 psi at idle, then when I shut the car down it was back to 40. I maybe i didn't have it on tight last night, I was doing it in the dark. If the pressure holds could the hard morning starts be from a bad battery since it did start fine after having the charger on it?

 

Mine is hard starting after sitting for more than a few hours but starts fine after only like a brief sitting period.

 

Since you stated this I would ohm the injector coils cold and then again when hot/when having the starting problems, and see what you get. The resistance could be different once they are hot. Test that and post the numbers.

 

Will do tonight. Still sound like my pump may need to be replaced as the numbers are a little low it seems.

 

How long since you replaced the fuel filter? It could, along with any other obstruction, cause the fuel pressure to not be up to par.

EDIT: Also since you have a fuel pressure guage, you might want to attach it and drive around while keeping an eye on it. Mainly when you have the hard starting problem.

 

I have a fuel filter at home wating to go in, its been about 20k. Will probably do that tonight too.

 

Define hard morning starts? Does the engine turn over quickly but just doesn't start, or does the engine turn slowly while cranking?

These cars have a buttload of electronics which need steady DC voltage to work properly. The starter consumes a lot of current while cranking, and if battery is in its final death knoll, the voltage could be dropping so low that your PCM is

FFT....

 

Turns over quickly but dont start.

I havent had a chance to ohm the injectors yet. I bought a battery on the way home from work anyway. Let it sit for a few hours went to start it and it turned over quick again but didnt start for few seconds. Turn key off, try to start again a few minutes later and it fires right back up. So it doesnt seem to be a problem with the injectors being hot or cold.

I did the thing where I hold the gas down for second before starting too and it didn't make a difference.

Checked pressure again and its holding at about 41 psi with the car not running. Doesnt seem to be dropping, so I must not have had the guage on good last night.

 

This thread is getting long, so I may have missed a thing or two about a thing or two. But have you checked for stored error codes?

Also, good idea to check your FI ohm'age when u get a chance. If you have a mechanics stethesope(a few bucks at Harbor Freight), place it on each injector while car is idleing, and listen for constant "clicking" on each FI.

and maybe, just maybe, your ICM may be dying a slow death...has this component been replaced recently, or is it original????

I don't want to get slammed by CFI-EFI for recommending that you keep throwing parts at it until you solve the problem...

Also, is this just a starting problem? Doe's the car run nicely during normal driving?

 

Runs perfect while driving, I have code c72 which is from my aftermarket stereo I believe.

ICM is original. If it was the icm would it hard start once and then immediatly after start fine?

 

I pulled the fuel rails and pressurized the system with towels under the injectors and none seemed to be leaking.

 

Just checked again and it isnt holding pressure, don't know what happened at lunch today. Maybe I fogot to take the keys out. I am pinching them off at the fuel rails, I dont know where to pinch at the tank, all i see is the two steel lines.

 

Ok its something before the fuel gets to the fuel rail. If I pinch the feed line at the fuel rail and let it sit for 5 minutes the pressure holds, upon unpinching the pressure drops immediately. Just to be sure I pinch both the feed before the rail and the return after, let sit for 5 minutes and only pulled the return pinch, no drop, removed the feed line pinch and it dropped right away.

So what would this be and why would it only cause hard starts after sitting for a few hours, even if the system pressurizes again upon clicking the key?

 

His note is very profound and undeniably logical.

Now back to the regulary scheduled program.................

 

You did the test and came up with more info. So, if you pressurize the system and pinch off the return line and release...the pressure holds? If you pressurize the system and pinch off the feed line and release...the pressure drops? You pulled the injectors and pressurized the system and found no leaks...injectors are good so lets move on. I would also ohm them just for fun to see if the coils are good. I believe you have a fuel problem causing the hard starts. I'm going to say you will find your answer in your post above. A normal fuel pressure will hold no matter.

You had pressure in the system the second time.