non starting Chimera

[barrybike]

Can anyone help, my 94 chimera was running well, come to start it in the morning, engine turns,spark at plugs, fuel at the pressure regulator, but does not seem to be opening the injectors. have fitted 2 new bosche relays, but nothing, engine turns but will not fire, at wits end please help thanks barry

[spend]

Did you check the fuses before changing the relays (& test they were getting juice)?

Hearing the fuel pump buzz is normally a good indicator that these are all OK....

Dave

Edited by spend on Wednesday 11th April 20:57

[barrybike]

hi spend, yes one was faulty, but it ran for a bit yesterday and then nothing, now with the new relays nothing again, have left the ecu off tonight to see if it resets itsself. thanks

[hut49]

For these "running fine one day / doesn't start the next" situations (and assuming battery condition is good) I would always suspect the immobiliser. Presumably you have tried re- and deactivating the alarm/immobilizer? Is the fuel pump priming when you switch on?

[barrybike]

Hi hut, been running fine, then saturday would not start, started monday ok , no back to non starting, great fuel supply ay the pressure regulator but nothing seemd to be getting to the engine

[spend]

Have you had a look at a plug, they flood very easily....

Dave

[barrybike]

latest update started first time sunday aaaaaaahhhhhhhh and monday with plenty of cranking, chainged the cold start switch with no real differance so its of to the local land rover garage for a code check and read out for £25 plus vat so hopefully will no the problem from the codes it issues, will keep u informed, the joys of owning a TVR my wife says it stands for Terible Vehicle Reliability !!!!

[GreenV8S]

barrybike said:

chainged the cold start switch with no real differance

The Chimaera engine doesn't have a cold start switch.

If I were you I'd confirm you had a spark and fuel at the plugs, if not then you need to trace the fault (or get somebody else to), if you have both then clean plugs would be the next step.

[spend]

Where do we sign up for these shares in temperature sensors then?

Dave

[barrybike]

the chimera has a coolant temp sensor, which if faulty, the ecu will base its fuelling on the wrong values, so is a sort of cold start unit !!!!!!!!!!!!!!!!!!

[spend]

FWIW:
Dont worry about coolant temp and air flow meter sensors - these can all be disconnected and the engine will still fire - not great but it will go. If your car wont start, let alone run, look at basic things like fuel delivery/pressure and correct spark etc. IIRC its like 600rpm before the ECU takes any notice of sensors.

Rough running & idling are very different from no bangs at all....

Dave

[griffter]

Fuel pressure and spark but no injectors opening sounds like the a break in the wire from the dizzy to the ecu to tell the ecu the engine is turning and at what rpm. This is a single wire running from the ignition amplifier to the ecu - I forget which pin. Sound like you've got intermittent contact on it.

[barrybike]

guys thanks for all the replies, when it gets warm it is fine, runs starts great fuel consumption, its a cold start problem in the mornings. off for a code check in the morning so will let you know. cheers again