Fuel Pump?

[montyb68]

hi i have a 89 st165 that will start and tick over fine but as soon as you hit the gas it just dies

i have just had to be towed home and the engine was running all the way.

but will not go over idle.

could it be the fuel pump?

the car has some mods done to it by the last owner.

it running about 10psi of boost at the moment.

and was running fine to this morring.

any help will be gladly recived

thanks

[daktari]

Hi. Welcome to TOC. Congrats on getting the 165. Really need more info on modifications and if possible any error codes.

[montyb68]

hi i have a 89 st165 that will start and tick over fine but as soon as you hit the gas it just dies

i have just had to be towed home and the engine was running all the way.

but will not go over idle.

could it be the fuel pump?

the car has some mods done to it by the last owner.

it running about 10psi of boost at the moment.

and was running fine to this morring.

any help will be gladly recived

thanks

hi right the mods are a alloy catch can ,manual boost controller set at 10psi, a fuel cut defender

It has a ct26 turbo with upgraded internals.It has had the TVIS system removed.

The head has been ported and gasflowed also Group A metal head gasket.

The exhaust has been de catted and is a stright through system with a 5" tail.

no error codes.

ive just beeing out in the rain to have a look and it starts frist time but will not go over 1000 _1500rpm

runs lumpy at the choke is trying to run higher revs but it does not want to rev that high...

i dont know much about gt4s as ive only had it a few months

[daktari]

Stab in the dark time. Find the diagnostic socket. Not sure where its at on the 165. Poss by the passenger side susp turret. Bridge the B+ and Fp connections. This should bypass the fuel pump relay. See if that helps. Again not sure where the FP relay is on the 165. If you have two fuse boxes under the bonnet it`s probably in the one by the alternator. Worth checking that as well.

[montyb68]

Stab in the dark time. Find the diagnostic socket. Not sure where its at on the 165. Poss by the passenger side susp turret. Bridge the B+ and Fp connections. This should bypass the fuel pump relay. See if that helps. Again not sure where the FP relay is on the 165. If you have two fuse boxes under the bonnet it`s probably in the one by the alternator. Worth checking that as well.

hi mate right ive just tried the bridge on the diagnostic but still the same..

ive no real way of checking the relay as i dont have a meter..

any ideas?

[daktari]

Logically. If the pump was fubar you`d have no fuel getting through at all. It`s running but not revving. Could be fuel pressure. So perhaps check to see if the fuel pressure regulator is ok. Maybe the vacuum pipe to that has come adrift or split. No real way to check the fuel pressure without a gauge.

Really it could be a number of things. Without proper workshop facilities, gauges and meters etc. It`s just a case of checking all the vacuum pipes for splits/breaks . Making sure everything is connected. Throttle switch connector is worth looking at too.

Sorry i cant be of more help. :(

[montyb68]

Logically. If the pump was fubar you`d have no fuel getting through at all. It`s running but not revving. Could be fuel pressure. So perhaps check to see if the fuel pressure regulator is ok. Maybe the vacuum pipe to that has come adrift or split. No real way to check the fuel pressure without a gauge.

Really it could be a number of things. Without proper workshop facilities, gauges and meters etc. It`s just a case of checking all the vacuum pipes for splits/breaks . Making sure everything is connected. Throttle switch connector is worth looking at too.

Sorry i cant be of more help. :(

thanks mate ill get out there and have a look when it stops raining

thanks again

[montyb68]

Logically. If the pump was fubar you`d have no fuel getting through at all. It`s running but not revving. Could be fuel pressure. So perhaps check to see if the fuel pressure regulator is ok. Maybe the vacuum pipe to that has come adrift or split. No real way to check the fuel pressure without a gauge.

Really it could be a number of things. Without proper workshop facilities, gauges and meters etc. It`s just a case of checking all the vacuum pipes for splits/breaks . Making sure everything is connected. Throttle switch connector is worth looking at too.

Sorry i cant be of more help. :(

thanks mate ill get out there and have a look when it stops raining

thanks again

well guys it was the air flow meter that was dead ive fitted a new one i had bit of luck that but now its not pulling full boot only 6psi i was pushing 10 before.. any ideas??