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hi all need help i own a 350i tasmin 1984 model i have been looking at relays etc indicators not working ,now the car starts but stops after 10 seconds .had an auto electrician look friday he got the car running and said one fuel pump relay not working right not switching he buy passed relay and car started but was running low on idle paid him some money tried to start car nothing . please any help would be good he is coming back monday to look sorry it is a long quiestion thanks mike .
Hello Mike,
There are EFI details on www.tvrwedgepages.co.uk in the maintenance section, I have had a look at the circuit diagrams and I see one fuel pump relay. If it is a relay issue I would put a meter on the white/purple wire (Feed to pump) to see if there is a supply while cranking the car. However it could be a number of things but if you are convinced it is a fuel problem start at the pump check for power at the terminals (Remember you need to crank the car to activate the relay) and if no volts step back a component at a time to check circuits.
Not sure if this helps but good luck
Hamish
400SE
There are EFI details on www.tvrwedgepages.co.uk in the maintenance section, I have had a look at the circuit diagrams and I see one fuel pump relay. If it is a relay issue I would put a meter on the white/purple wire (Feed to pump) to see if there is a supply while cranking the car. However it could be a number of things but if you are convinced it is a fuel problem start at the pump check for power at the terminals (Remember you need to crank the car to activate the relay) and if no volts step back a component at a time to check circuits.
Not sure if this helps but good luck
Hamish
400SE
Mike, hope you have the car sorted by now as I have only just come across this site. However if you still have problems check the underside of the relay very carefully. I had a similar problem a couple of years ago after I had been fiddling with my relays, the car would fire up no problem but just die after a couple of seconds. I spent ages checking every wire, connection and component I could think of, it even baffled a friendly auto electrician. In the end it was so simple....I had put the wrong relay in the hole! One of the relays is very slightly different to several of the others in that one of the pins is marked 87a rather than just 87. I only found this out when I spoke to Mark Adams when I had convinced myself the ECU was to blame. He is so clever and I am so thick!!
In my experience as a service engineer, electronic/electrical faults can be divided into three categories, with probability expressed in [square brackets] as follows…
1) Bad connections, i.e. crimps, connectors, wires, solder joints. [39%]
2) Fingers, i.e. it worked, then a human touched it, now it doesn't work.
What caused the problem? (rhetorical question)[59%]
3) Component failure. [2%]
The exact split between 1&2 depends on the competence, or in~, of the fingers used.
I have been caught out by my own incompetence, more times than I care to admit. The first thing I try to think of with a new fault is…
What did I tough after it last worked?
The second thing I try to think of with a new fault is…
What did someone else tough after it last worked?
You get the gist.
Obviously it gets more complex when you have a fault and then fingers get put into the equation.
Not much help I'm afraid but that's life
1) Bad connections, i.e. crimps, connectors, wires, solder joints. [39%]
2) Fingers, i.e. it worked, then a human touched it, now it doesn't work.
What caused the problem? (rhetorical question)[59%]
3) Component failure. [2%]
The exact split between 1&2 depends on the competence, or in~, of the fingers used.
I have been caught out by my own incompetence, more times than I care to admit. The first thing I try to think of with a new fault is…
What did I tough after it last worked?
The second thing I try to think of with a new fault is…
What did someone else tough after it last worked?
You get the gist.
Obviously it gets more complex when you have a fault and then fingers get put into the equation.
Not much help I'm afraid but that's life
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