Gems engine will not start

[Keithy P38]

Asking on behalf of an elderly mate! His '98 HSE won't start! It'll turn no worries, fuel filter is brand new, fuel pump is (now) brand new, plugs and leads in good condition. The thing stopped in traffic a few weeks ago and still won't start!

I don't think it's the crank sensor (but I can't be certain as I can't check diagnostics). It cranks fine though, battery voltage is perfect.

Have done a search and not turned anything up.

Cheers
Keithy

[TheTree]

Mate

If it stopped suddenly it points to something like the CPS.

Sounds like he needs some diagnostics plugged in, a generic tool should do the job for engine codes

Good luck
Steve

[Keithy P38]

I will let him know, it springs to mind to me too. Normally when the CPS goes you can cool it down and get going again - this engine won't fire!

I might ask him if he's replaced it (he had a '96 SE before this one and the CPS was one of his replacement items).

[Keithy P38]

I spoke to old mate this morning, he says he replaced the crank position sensor a few months ago. It was getting "jerky" and hard to start beforehand, and knowing that it was an item he had to replace on his old P38, he replaced it anyway which stopped the "hard starting" and "jerking".

He has it at his mechanic (who also happens to be my mechanic), I'll give him a ring!!

Any thoughts on camshaft position sensor? Would that be a show-stopper or would the ECU just run in "hope it's right" mode?

Cheers
Keithy

[benji]

Cam sensor won't stop it running. It's only there for timing advance and isn't part of the start up in the ecu.

He's obviously getting fuel pressure at the rail? Seems a silly question but if the crash sensor has gone bung it'll turn the fuel pump off.

The ecu, injectors, cam sensor, airflow sensor and purge solonoid all run off the engine main control relay (RL19) which runs off F37.

The ignition relay (rl15) supplies power to F26, which supplies +power to the coils.

If the engine check light doesn't go out at start up it means the ecu is out of sync with the becm security code.

Good luck.

[mtb_gary]

Keith

Copied from RAVE p22/578


Relays

The engine management system uses four relays:
– Starter motor, ECM (Z132) power supply (main
relay), ignition and fuel pump, all located within the
fusebox.

Main Relay

This relay supplies the power feed to the ECM
(Z132) with a tap off to feed the fuel injectors and air
flow meter. This relay is controlled by the ECM
(Z132) itself, so that the ECM (Z132) remains
powered up after the ignition is removed and the
ECM (Z132) can record all temperature readings and
motorise the Idle Air Control Valve (M112) to the fully
open position. This is known as the “ECM (Z132)
power down routine”. Failure of this relay will cause
the ECM (Z132) to not be switched on, resulting in
absence of fuel and spark and therefore a failed
start.

Down the same path as Benji suggested...

Gary

[Keithy P38]

Just following up on this, he was sent two "new" fuel pumps from a reputable rover spares place which were faulty. The third pump was a winner, his Rangie is now up and running again.

Cheers
Keithy

[PeterAllen]

Thanks for the update, That would surely **** you off getting and installing faulty parts not just once but twice. Glad its sorted.

[Keithy P38]

Yeah he was fuming! The first two pumps were both suss... First one had a cracked plug when he got it, second one wouldn't pump!

[davidsonsm]

Did he have the access hatch or was he dropping the tank each time?

[Keithy P38]

It was at the mechanics, so tank out! Luckily he had the brains to test the pump without fully installing the tank. An auto electrician confirmed the power to the pump was not the issue, and was in fact faulty (new) pumps as the issue.

[davidsonsm]

The benefits of using the professionals hey.

[FANTOM P38]

Thats worth remembering. And just as well I setup access hatch when I replaced my original one. Have also read somewhere that a commodore pump is same as P38 wonder if they are more reliable ?

[Keithy P38]

I'd say a 5 to 8yr life is good for a fuel pump, about average!

[benji]

And that doesn't mate if the car runs on lpg or petrol either.