Reply With Quotewhich engine?
Master
SupporterHi All,
My 96 occassionally does not want to start. The starter turns and then wont fire up.
This happens at random times and there is no general pattern. Usually after a few minutes of not starting it will then fire up without an issue. The next ten or twenty starts will not be an issue (cold or hot) and then again it would happen. I have tried moving the gear shift and there does not appear to be any pattern to it other than random selection and usually when you are rushing to get somewhere. Any thoughts on what is happening? It must be electrical.
RoverLord
which engine?
Dave
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Master
mine does a similar thing occasionally where you turn the key and its all dead. locking and unlocking usually fixes it for me.
OldBushie
As it's cranking fine, it's not going to be a gear lever issue so it's going to be either spark or fuel.
If it's easy to replicate, remove a plug lead & see if you can hold it (with insulated pliers) about 5mm away from a good earth point. Have someone crank over the engine & see if a good spark is present.
It does sound like a fuel pressure issue though so try turning the ignition on/off a few times before cranking. The pump will operate enough to get some line pressure happening & it should start up easier.
Scott
Master
SupporterThe engine is 4.6 litre. I have it started again after recharging the battery and I am begining to look towards the fuel pump as being a suspect.
Have noted that it tends to do it when I am low on fuel.
Is the fuel pump in the tank of these, like the classics or located elsewhere?
after starting I filled her up and haven't had the issue reoccur so far.
AT REST
The pump is in the tank. Some models of P38 have a floor hatch over the pump, its under the back seat somewhere under the carpet. I remember doing one once, had to unscrew the seat lower half I believe. You should always listen for the pump noise when it fails to start. The pump should be audible for about 1 second after cranking.Originally Posted by PeterAllen
Master
SupporterThanks Bee utey,
I have had a bit of previous experience with replacing the Classic's fuel pump think 4 in 20 years and will carry a piece of 4 x 2 as well for good measure to smack the tank with. Will see when it decides to much up again.
Fossicker
I suffered a similar problem a year or two ago, intermittant problem always happening at the most inconvenient times.
It was traced to a weak fuel pump. The injector supply line pressure was reading just on minimum spec pressure and a new pump cured it.
Best of luck.
Troy N
Master
SupporterThanks for the advice, I'll let you know the outcome when it decides to repeat the fault but for now the engine is starting and running well, I'll keep a look out for fuel pumps on the net.
Swaggie
Don't discount the possibility of the crank angle sensor being faulty. For example with the Thor engine (Bosch Motronic version 1999 on and D2) If you have no fuel pressure, no injector pulse AND no spark it could well be this as the crank signal tells the fuel pump to start and the injectors to pulse, and obviously the spark to spark.
Do not do this with a hot engine, but on the GEMS motor there is a schrader valve on the fuel rail drivers side. After a cranking acticvity there should be 30 to 35 Psi in the fuel rail if the pump is doing its thing. Just depress the valve and see if ANY pressure is evident.
I think from memory the fuel pump will still buzz when cranked even if the crank sensor is faulty with the GEMS engnes.
JC
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