Hi, I've been reading some very useful info on this forum and was wondering if I could I get some much needed advice. I drive a '97 Cinq Sporting, and for the last 2 months I've been driving it sort of stalls momentarily when driving, coinciding with the injector warning light coming on. I noticed that if I eased off on the revs the prob would go away, so I figured that something was on the way out yeh - but chose to ignore. Today tho' it was doing it much more, and then it packed in altogether and I cant start it at all. All the lights come on, however you can't hear the fuel pump whirring like normal as it brings fuel to the top of the engine. It did start after I left it for 20 minutes, but I drove it a mile and it conked out, and I had to leave it on the roadside. Call emergency tow tomorrow.
I am not sure, but does this sound like the lamba sensor, and something else to do with the fuel pump? I did have an issue with the fuel pump a little while ago, where I was changing the front wiper motor and I knocked a fuse that's under the little black box that's just in front of the ECU out of it's position (just in front of two relays) and of course the car wouldn't start since this fuse controls the fuel pump, however I replaced the fuse, then and it started right away, no probs. But this was unrelated to the problem with the fuel pump now since I checked the fuse and it's fine. What else controls the fuel pump? Which of the sensors would govern if the pump operates or not? MOT tomorrow too - good grief !

My guess is TDC sensor (or the wiring to it). Basically, no signal from that will convince the ECU that the engine isn't turning, so no spark and the injector won't open.

Betcha that after the fuel pressure has decayed (say in the morning) you will hear the fuel pump.

fingers99 said:

My guess is TDC sensor (or the wiring to it). Basically, no signal from that will convince the ECU that the engine isn't turning, so no spark and the injector won't open.

Betcha that after the fuel pressure has decayed (say in the morning) you will hear the fuel pump.

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Thanks for reply, but I tried it this morn and no whir from fuel pump ergo no start . BUT, fortuitously, a friend is getting rid of his Cinq (same age, same color) which IS MOT'd till next Sept. Why this is so is like one of those strange Sod's/Murphy's laws as I have a cheap replacement car though now I have two headaches to deal with . Will still want to work out what's the problem tho. Shall I tinker with the TDC then? 'Preciate it

Wiggle the crank sensor wiring and connection, you might get the pump buzzing. Otherwise swap out the multi relay beside the ECU.

Cheers

PD

Got my new Cinq today, so no worries on fixing the old one. I'd say I'll swap around parts and should have a neat little runaround at the end of this fiatsco :slayer:! It's MOT'd till next Sept so no worries on that.
I think it may be the relays though, I haven't checked the crank sensor, however, the last time the fuel pump didn't work it was in a fuse to those relays (in little black box behind ECU), qouting from 4.8 in Haynes - " the main purpose of these relays is to supply current to the fuel pump, ignitiion coils, oxygen sensor, injectors, and EVAP Solenoid". However I've had the injector warning light coming on for ages, like 2 months, coinciding with stalling etc, like I described, and doubt it relays gradually fail or not - doubtful. However will sway ones in new cinq to old to see what happens - Thanks Again