fuel pump
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
First check your schrader valve and see if you have fuel pressure. Do you have a fuel pressure gauge? If so, then put it on the valve and check to see what your pressure is. I am assuming you have a 88. Pressure should be up around 36-42 pounds I believe.
Then check to see if you have spark.
Then check to see if you have spark.
Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
what do you mean exactly?
it will not start? Does not engage the starter? or does not do ANYTHING when the key is turned to start? engine rotates but does not fire?
or it will not stay running?
big difference in no-start problems and running with multiple misfires.
More and specific info is needed.
Have you done the basic test?
spark
fuel pressure
injector
fuses
clean all battery connections as well as harness grounds
it will not start? Does not engage the starter? or does not do ANYTHING when the key is turned to start? engine rotates but does not fire?
or it will not stay running?
big difference in no-start problems and running with multiple misfires.
More and specific info is needed.
Have you done the basic test?
spark
fuel pressure
injector
fuses
clean all battery connections as well as harness grounds
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Safety Car
Joined: Apr 2011
Posts: 3,660
Likes: 22
Push in the schrader valve....you should get a face full of gas. If NOT, then trace the missing voltage to the fuel pump. My first stop would be the fuel pump relay.
The C4 has a built in backup for that....if the relay fails, you can grind on the starter longer and as soon as that makes 4 psi oil pressure it WILL energize the fuel pump.
Try cranking non-stop for as much as 4-5 seconds...that should be long enough to generate oil pressure.
if no go...then start testing for a dead pump.
Somewhere in all this, verify spark with a spark tester or simply lay a plug on the engine and crank it and watch.
The C4 has a built in backup for that....if the relay fails, you can grind on the starter longer and as soon as that makes 4 psi oil pressure it WILL energize the fuel pump.
Try cranking non-stop for as much as 4-5 seconds...that should be long enough to generate oil pressure.
if no go...then start testing for a dead pump.
Somewhere in all this, verify spark with a spark tester or simply lay a plug on the engine and crank it and watch.
Thread Starter
Cruising
Joined: Feb 2013
Posts: 12
Likes: 0
From: Lady Lake FL
I checked and the fuel was bad. I cleaned it out and put c-foam and new gas, but it won't start. It did get it to start when I removed the shraeder and sprayed starting fuid, but it didn't last long.
How do I get to the pump? Can anyone send me photos. This is for the '88.
How do I get to the pump? Can anyone send me photos. This is for the '88.
Pro
Joined: Jan 2012
Posts: 605
Likes: 2
From: Queen Creek Arizona
I checked and the fuel was bad. I cleaned it out and put c-foam and new gas, but it won't start. It did get it to start when I removed the shraeder and sprayed starting fuid, but it didn't last long.
How do I get to the pump? Can anyone send me photos. This is for the '88.
How do I get to the pump? Can anyone send me photos. This is for the '88.
