Engine turning over but no start

[evo8yea]

Well had the car running perfect a few days ago....went to start it and move not it only turns over and over. Any insight would be amazing!

This is all that I have checked so far...

All 4 cylinders are getting spark

Fuel is getting to rail

Checked MPI fuse and is fine

Ecu looks good with no leaky caps

Replaced MPI relay and still no change

FPR gauge is reading 43psi when priming but drops to 0psi when trying to start

Removed CAS and rotated it by hand and all 4 injectors are clicking when doing this

Coolant Temp is reading correct

Throttle pos is normal also

Perfect compression

 

[Bud92gsx]

If you have another ecu, I would try that..I had the same problem like last week..It ran when I parked it, sat a couple days went to start and she would crank and crank but no start..Switched ecu's and she started right up.

The ecu that was in the car had alot of damage..But it had damage when I swapped it in, It just decided to take a shit..

 

[steve]

FPR gauge is reading 43psi when priming but drops to 0psi when trying to start

That's not right.

 

[evo8yea]

That's not right.

ok..... what are you thinking?

 

[Bud92gsx]

That is not right..I had to re read that part..It sounds like your pump is turning on in ACC and of when cranking..

You need to add more mods to your profile than "tons"..It's not very easy to help you diagnose when we don't know your true mods..

 

[steve]

You have to have fuel pressure while cranking. If you have a 5 speed it should be 36.3 psi base and about 27 psi while cranking.

 

[evo8yea]

That is not right..I had to re read that part..It sounds like your pump is turning on in ACC and of when cranking..

You need to add more mods to your profile than "tons"..It's not very easy to help you diagnose when we don't know your true mods..

UPDATED

No pump is not cutting on when turning car over. Pump is setup via external switch

You have to have fuel pressure while cranking. If you have a 5 speed it should be 36.3 psi base and about 27 psi while cranking.

It is a auto swapped with 43psi when pump is priming. When turning over the gauge is reading 0psi

 

[Bud92gsx]

So you have to turn the pump on via switch.Can you hear it turn on when you flip the switch??.Theres something going on between the ACC and on position of the key..Can you hear the pump turn off perhapps when trying to crank?

 

[evo8yea]

So you have to turn the pump on via switch.Can you hear it turn on when you flip the switch??.Theres something going on between the ACC and on position of the key..Can you hear the pump turn off perhapps when trying to crank?

yes I can hear the pump turn on when I toggle the switch. Once I go to start the car you can no longer hear the pump running

 

[steve]

It is a auto swapped with 43psi when pump is priming. When turning over the gauge is reading 0psi

Then while cranking the fuel pressure should be 34psi or so depending on how much vacuum it makes cranking.

 

[evo8yea]

Then while cranking the fuel pressure should be 34psi or so depending on how much vacuum it makes cranking.

That is what i was thinking also. I'm going to straight wire the pump without relay and this should resolve the problem