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        General >> Problems >> problems starting
        
(Message started by: dave82506 on Jul 11^th, 2007, 6:47pm)

Title: problems starting
Post by dave82506 on Jul 11^th, 2007, 6:47pm

Help. More problems with my 24v. On the odd occasion the car refuses to start. It fires and runs rough, crackles, smokes, strong smell of fuel. As soon as drive engaged it stalls. Sometimes Feels like there is no fuel? In fact on 2 occasions I have put fuel in and it has solved the problem. But on each occasion, the fuel guage has shown over quarter of a tank and 80+ on the computer. Initially I thought it was only when the car is hot. But it has just happened from cold. Any Ideas. Have just bought some carb cleaner to clean the MAF. Read on here that can work miracles.

Title: Re: problems starting
Post by dave82506 on Jul 11^th, 2007, 10:25pm

Well, I have now cleaned the MAF. All this has done is made the idle slightly more eratic than it was, and I am now adicted to the smell of carb cleaner :o I checked the plugs and they are well and truely sooted up. Cleaning them has not improved anything but there is obviously some kind of fuelling problem I supose??

Title: Re: problems starting
Post by TiberiuS on Jul 11^th, 2007, 10:36pm

Hi. Just replied to your other thread.

If it's running rich it could be oxygen sensors or even fouled injectors, you really need a scan to tell you, showing fuelling trims etc.

Whereabouts are you mate? I'm near Colchester in Essex, could do a scan if you're nearby.

Regards, Bruce.

Edit: just re-read your first post, sounds like it's certainly flooding so could still be the fuel pressure regulator. If you hold the throttle wide open and crank it it should (I say should because some cars don't) cut off the fuel so you can 'dry' the engine out...safer is to remove the fuel pump relay and crank it.

Title: Re: problems starting
Post by dave82506 on Jul 11^th, 2007, 10:59pm

Hi there. I am in Caterham Surrey, but thanks for the offer. I was thinking that it could be the FPR, seems to make sense. Who knows. Only had the car a short time and have had quite a few probs. Despite the probs there is still nothing quite like it when it does decide to run right. Will have a good look at it tomorrow and see if I can get to the bottom of it.

Thanks for your suggestions
Dave

Title: Re: problems starting
Post by dave82506 on Jul 12^th, 2007, 10:24am

Hope I don't get too much of a ribbing over this. Now I am no Mechanic you understand. Went out to have a good look at the car this morning. First thing I intended to do was try the wiggle of the maf connector. AND GUESS WHAT? I hadn't re-connected it yesterday :-[ How embarrassing is that! Thought this must definately be the reason idle was worse.
I read somewhere on here that the tps can sometimes play up and disconnecting the Batt for 30 seconds should clear it. So I did this, put EVERYTHING back together again and started the car. Kept stalling initially, managed to get it off the mark and drove for a while. Very lumpy, surging and a bit of backfiring, then suddenly, it all smoothed out and became normal. Have retired inside for a while as it is raining quite hard now. In another post I mentioned that only one fan was running, and pretty much as soon as car is started. Well that has stopped since I did the battery thing. I will take it for a run and see what happens next.

Title: Re: problems starting
Post by TiberiuS on Jul 12^th, 2007, 3:41pm

Hi. Don't worry, it's been done many times before :).

Really sounds like the FPR to me, sometimes the diapragm fails and they put through way too much pressure to the fuel rail, flooding the engine with fuel. On the Jag there's a vacuum hose which goes into the inlet manifold to alter the fuel pressure according to engine RPM/throttle, not sure about the 24v. If the diaphragm rips it can dump fuel into the inlet manifold or flood the injectors.

Hard to say but my first thought would be with the reg, any chance of getting a mechanic to put a gauge on the fuel rail and test the pressure?

Hope this helps :-/

Title: Re: problems starting
Post by dave82506 on Jul 12^th, 2007, 4:48pm

ANYONE WANT A SCORPIO 24V :'(
Didnt think I could get this down about a car in such a short ownership. Still running rough and appears to be getting worse, some smoke out the back if I put foot down, on a hill for example. Also, since I diss and re connected the battery the fans do not come on. Left it running when I got back from a run and the temp just rocketed. I shut it down as it hit bottom of the Red. What happens when I try to start the car is it turnes over for much longer than usual before it eventually fires. It then stalls within about 5 seconds. The only way to get it to run is if I start it in neutral rather than park,gentle throttle pressure and get it into Drive and put the throttle down to catch it before it cuts out again. Once I have managed this, it idles roughly, but doesn,t cut out. On one occasion today, during starting, some smoke came from the fuse box/battery area of the bonnet??
PROBLEMS PROBLEMS

Title: Re: problems starting
Post by dave82506 on Jul 12^th, 2007, 11:37pm

Thanks for the suggestions tiberius. I think I will change the FPR and see what happens. Tonight I have removed and thoroughly cleaned the plugs (again) removed the engine cover and checked all the sensors I could find. Made sure there where no air pipes missplaced. Had a good look at the fuel pump relay and cleaned all the contacts. Took the battery off for an hour or so. When I turned the key after all of this, it started straight away, then died. Did this twice, then on the third turn it settled and kept running. Went for a longish drive and after a few miles, all seemed fine, and when stopping at lights the idle was nice and steady around the 800ish mark. Temp guage stayed central and felt like problem solved. BUT THEN :'(
I stopped at a garage to get some milk, when I restarted the car, it started to play about and stalled again. Got it going using slam into drive method and then all seemed fine again. This is really doing my head in now. If it were the FPR would it behave like this do you think? Also, the fans still dont cut in. It all seems a bit electrical faultish to me ???

Title: Re: problems starting
Post by WAYNE on Jul 13^th, 2007, 10:50am

Hi
Try checking the wiring to the engine coolant tempreture sensor,just above the waterpump as the sheathing on the wires are prone to becoming brittle and break up causing bare wires to touch. This will cause fans to come on at start up and also cause rough starting.This happened to mine so i repaired and all was ok.hth
regards,
wayne.

Title: Re: problems starting
Post by dave82506 on Jul 17^th, 2007, 5:57pm

Hi Wayne. Had a quick inspection of this area this morning. Have to say, it looks a right old mess. Can't see any bare wires, but someone has obviously had a good old go at it at some earlier stage in the cars life. There seems to be various colours of insulating tape all over it. :-/ I will strip it all down and repair tomorrow. So fingers crossed. Its amazing this site, all the problems I have had in a relatively short ownership, there is always someone out there who has experienced the same or similar. Thanks for the suggestion
Dave

Title: Re: problems starting
Post by dogma on Jul 20^th, 2007, 12:33am

Hi mate, i have a fpr off my 2.9 12v scorp, if it is the rite one let me know and ill send it to you. I know it definatly works, all i ask is if its not or doesnt make it any better, you could send it back for someone else
let me know
jim

Title: Re: problems starting
Post by dave82506 on Jul 20^th, 2007, 4:01pm

Hi Dogma, Top man. These cars are quite amazing aren't they. I gave the car a real good going over. Cleaned the plugs and the sensors. Amazingly, the car has been running like a dream for over a week now. It gets a bit hot occasionally but I think thats because I still have a fan issue (just one running) sorting out a replacement relay. So thanks very much for the offer, but (for now anyway) hang on to it.
Once again, Thanks very much for the kind offer :)

Regards Dave