The Thomas J

I have been using the forum to try and trouble shoot my issues. Before I go any further I want some advice.

I had some work done on the car prior to having the work done it was running fine. The only notable issue was a little hard to start sometimes when warm. I had the A/C clutch replaced and a new brake booster installed.

When I picked the car up it wasn't running right. It kept stalling and hard to start. Finally, it just died and wouldn't start at all. I was at the car wash when this happened. It didn't sound like it was getting gas when it was being cranked and the battery was run down in the process. we pushed it to the shop next door for the mechanic to look at it the next day. The next day I get the call the car was running they jumped the battery and it was fine. I picked it up and drove it all day and it was fine. Started fine, ran fine etc....

Next day I go outside to start it and nothing. Just cranks no start. I began to go through the system. I figured maybe something was dislodged when the booster was replaced. I checked and replaced the fuel pump relay. I checked the fuel rail pressure and there was none. Just in case the gauge went bad I put a gallon of fuel in.

I checked around the FPR the hoses were all attached. Finally, it started on it's own. I let it warm up for a while. Checked for vacuum leaks. Fuel pressure at the rail was 25 to 35. Shut it down and it wouldn't start at all. Fuel pressure dropped to 20. Then zero. I disconnected the vacuum lines from the FPR and the engine and now it's starting ok. Fuel pressure is still the same as before but it's running better. I put two screws in the manifold area to stop the vacuum leak from the hoses I disconnected and it began idling normally. There is no fuel smell coming from the FPR.

I have not started it in about a week. It started right up today and ran fine in the driveway. The car is running. But I am reluctant to take it anywhere without a battery pack and a can of starter fluid. I feel like it could still be anything from fuel pump/fuel pump sock to FPR and everything in between.

confab

I'm still getting familiar with the TPI myself, but from what you describe it sounds like the fuel pump.

My (very humble) understanding is when you unplug the FPR, you are getting unmoderated fuel pressure. If it runs better when the FPR unplugged, that would seem (at least to me) to suggest a pump issue also.

Good luck!

antfarmer2

Fuel pump or maybe the pulsater or filter or sock.

The Thomas J

Where is the pulsator located?

confab

It is in the tank. Right by the fuel pump. It looks like this:




Don't ask me the purpose for it. Reading your thread made me curious about it myself.

But, I know it can go bad and cause low pressure. So, that might be it.

The Thomas J

I have b een leaning towards fuel pump myself. Is the screen/strainer and the sock the same thing?
What is the most reasonable priced pump to go with? I have read some people do not recommend going with OE AC delco.

confab

It is probably the pump. It's a common point of trouble.
Yes.

I dunno for sure? I put a Bosh in mine, and it seems fine.

I'm happy with it.

Some people get religious about these things and only use Delco parts.

I think it was like, 80 bucks or so?

The Thomas J

I was leaning towards the Bosch too. I will pick up a sock, pump, pulsator and filter and have my mechanic put them in. I'm not in the frame of my mind to do a fuel pump in my driveway anymore.

aklim

Before we go there, lets put a gauge on the fuel system at the schareder valve. Turn it on but no crank. See what the pressure is and how long it holds. If it is about 40+ and holds for a couple hours at least, I would start the car and do a WOT run to see what the pressure is. It might dip a little from idle but it should catch up again.

confab

They come right out of the fuel door.. Pretty easy as far as a pump change goes.

aklim

Why is that? It is so simple. You don't even have to drop the tank.

Fuel Injector Give Jon a call to confirm which one he recommends.

Install Kit This will be everything you need.

aklim

So simple you can do it drunk and smoking a cigarette. Well, maybe not smoking is a batter idea

confab

Thinking back on what caused me to pull mine in the first place.. Apparently the C4's have problems with water entering the tank from the neck/gasket area.

I just could not get mine to run right. Traced it back to water contaminated fuel.

It is probably worth looking closely at the fuel in the tank while you have it apart for this reason.

If there is a problem, you can reach the whole inside of the tank from the sender area and mop it out.

The Thomas J

Wait? What? Seriously??

aklim

Absolutely .

confab

Oh yeah.. Easy.

Remove the fuel door and the gasket, and you can see the whole thing.

RICHARD TILL

It`s so easy a female can do it. All the info you need is here.

Cliff Harris

This thread will give you pointers on how to get the fuel level sender and fuel pump out of the tank:

https://www.corvetteforum.com/forums...h-article.html

antfarmer2

Many use the racetroics spelling is off but comes with everything you need. It is the easiest fuel pump you will ever do about the only thing easy on a vette. LMAO Even a place to set your beer and never even need to crawl stoop.

aklim

Not that easy. Remove the fuel door, drink beer, smoke cigarette, scratch ***, disconnect hoses, drink beer, smoke cigarette, scratch ***, remove the bolts that hold the assembly and remove gasket, drink beer, smoke cigarette, scratch ***, remove assembly, drink beer, smoke cigarette, scratch ***.