GavinP

It's MOT time and I have put the JECS back into my car and tried to start it - no joy.

Engine turns over but doesn't fire.

Works fine with the Link ECU though...

I have recently had the Lambda sensor replaced with the OE part and the Lambdalink is working normally so I would be surprised if it is that.

With the ignition on position 2, there is a clicking from around the turbo/coolant tank area so could it be the coolant sensor unless my ears are playing tricks and it is the boost solenoid?

No ECU error codes showing.

Aaahhh...

Any educated opinions welcome.

Thanks

Gavin

Pete Croney

Gavin

What year car is it?

GavinP

Sorry Pete - 1994 WRX Auto - Lambda is new OE part fitted today (wouldn't start beforehand either).

Thanks

Gavin

john banks

http://www.ravensblade-impreza.com/m...agnosisegi.pdf

Bob Rawle

Gavin, could be that the maf hot wire needs a good blast with brake cleaner, it could be furred up from lack of use, normally this would heat itself to red hot on ign turn off to self clean, since it hasn't been used then this could be the problem. I've actually taken cotton buds to one in the past (carefully) and cleaned it up that way.

cheers

bob

David_Wallis

link uses same crank and cam wiring and needs them I assume?

time to check for fuelling and spark..

David

Shropshire-Guy

Have you checked if youve got any sparky at plugs. Get a meter and see if you have 12 v coming out off amplifier.

Pete Croney

The most common cause of a pre 97 non starter is the water temp sensor. If its failed, the ECU will not invoke the cold start routines as the ECU thinks the engine is at 80degC.

The warm start in the Link map may have just enough cranking enrichment that it will still start even with a goosed sensor.

GavinP

Thanks for the responses - I will try cleaning the MAF as Bob suggested although it hasn't been on the car but stored indoors with the JECS.

Failing that, Pete, can you quote me a price for a new coolant sensor.

Thanks

Gavin

Pete Croney

Gavin

Roughly forty something quid plus the vat, without me looking it up.

GavinP

Thanks for the help guys - I have ordered a replacement coolant sensor from Pete and will trying cleaning the MAF in the meantime to see if that does the trick.

Thanks again,

Gavin

Pavlo

If the ECU is somehow faulty, the engine check light will not come on when you turn on the ignition, so check this first.

Paul

DaveD

iTrader: (2)

Don't want to put a dampner on things, but if the coolant sensor was broken the fans would be on constantly, and the CEL would be lit. Also the engine should start, although it will idle at approx 500rpm to start with and dislike any throttle input.

Would have thought more likely to be MAF, since mine won't event hint at starting with it disconnected.

submannz

As mentioned check for spark if no spark then most likely to be crank angle sensor

GavinP

I have tried the car again (without touching anything) and it started....

I managed to get down to the MOT centre and get them to check the emissions which were fine.

Thanks again for all your help.

Thanks

Gavin