anyone know much about xr4x4's? h reg, 2.9 efi. started running very rough last week, like it was on 5 cyls, but seemed to be just rough on all 6. won't start at all now. getting a spark, getting fuel into cyls. fitted new plugs and leads, changed airflow meters, tried another distributor, no better. any ideas?!
if no luck on here, click the link below and ask these guys.
http://forum.fordsierraclub.co.uk/index.php?sid=4e0362043b8111927b537c4671276731
Check its NOT over fueling, after time the diaphram in the fuel pressure regulator splits and large quantities of fuel enter the engine inlet
ports/tracts through the vacuum pipe connections. Simple cure, replace the pressure regulator on the fuel rail.
Hope this helps.
Enjoy.
cheers!
changed the pressure regulator, and it's started, runs ok on idle for about 5 secs, then gives a miss, almost stalling, then runs ok for another few secs. had all the plugs out, letting them and the cylinders dry out when changing the regulator, so not 100% sure if that was the prob. ( haven't got a timing light, so timing not set accurately yet). any ideas?
fuel pump gone i reckon
Sounds like it could be the idle speed control valve? Worth taking it off and cleaning with carb cleaner .
strip it.... great donor lol
checked fuel pump already, will clean idle sensor tomorrow. cheers! ps no use for donor - that would be a backward step from the bec...
Just a thought, have you changed the fuel FILTER lately.
Just had fun with my Ohmygod, thought it was the fuel pump, nope seems to have been the filter which has not been changed since year dot.
thanks for the thought! got it going, but it's still coughing and farting when sitting at a steady speed, or on the overrun, but seems to be running no bad when accelerating. changed the pressure regulator, but changed so many bits now, not sure when it started improving!
Have you changed the fuel filter, mounted just foreword of the tank. When I fitted my V6 I thought that changing the filter was a good idea, the old one weighed about five pounds, new one about half a pound. Just a thought, as its something that gets overlooked. HTH Ray
aye, it seems to be putting plenty through, but think i'll change it anyway - changed everything else so why not?! think i'll go and buy a corsa...
back again... it was going great yesterday, came home after a drive, turned it off, ten minutes later - won't start! been at it (!) this morning, fuel getting to fuel rail, but injectors not firing. what tells them to open? i've tryed another ecu, same, but what tells it to tell the injectors??!! aaarrgghhh!
probably throttle potentiometer gone mate, mine did the same.
Its either airflow meters or throttle pot on these, nothing else EVER goes wrong!
Held on the side of the throttle body by two screws, just swap it over.
ps great cars 2.9 4x4, got one meself!
[Edited on 6/12/06 by NS Dev]
[Edited on 6/12/06 by NS Dev]
quote:
Originally posted by NS Dev
ps great cars 2.9 4x4, got one meself!
cheers, throttle pot sorted it!
thanks for the offer of bits - could do wi glove box catch, two screws hold it on from inside glove box - if you can be arsed taking it off? thanks!
quote:
Originally posted by robby
if you can be arsed taking it off? thanks!
quote:
Originally posted by robby
cheers, throttle pot sorted it!
thanks for the offer of bits - could do wi glove box catch, two screws hold it on from inside glove box - if you can be arsed taking it off? thanks!
Have you got any idea why mine refuses to start ?
It turns over fine, there is plenty of fuel getting there (maybe to much?), it got a weekish looking spark (although the leads are crap)
If I try and start it, it'll turn over a couple of times sort of catch (if my foot is on the floor) it will then 'run' (lumpy as hell
and only with my foot on the floor) for 30 secs and die - after this it refuses to go agian - it I try again it just floods its self
Any ideas ??
airflow meter or throttle pot, as I say both give similar symptoms, the same as what you suggest, and not much else ever fails on these setups.
I'd stick my money on the airflow meters, especially if the engine has stood for a bit, and especially if water has got in them (they are
upside-down on these, and water sometimes gets down the spindle and onto the pot board)
get a replacement pair from a good breakers that will give refunds. Make sure they have the same long number on the top of the plastic lids too, as
ones from different cars are calibrated differently internally, and even though it is just a sprung locking ring, I've never had much success
copying calibration from one to another for some odd reason!!
If it still is bad, then its the pot. If you struggle I have a spare pot.
These are the same on granada 2.9 etc though so easier to get.
Meters need to come from an XR4x4 though.
PS get the impression you are worrying about spark. Very rarely a problem on these, can make them stuttery on sudden throttle opening if the plugs and leads are old and dodgy but they will run fine at idle and cruise on terrible leads and plugs!!!
Ok thanks, I actually only want to drive it 200 yards - park it - then take the back axle off
and since I don't want to spend money on it - I might just give up and tow it (I don't have a field to drive it in anymore anyway ->
slipery field + 4x4 + LSD + V6 = )
so I'll have airflow metres and throttle pot sensor spare (do you know how to test them off the car ??)
[Edited on 7/12/06 by mcerd1]
you can but I don't know the resistance values required and its a bit dodgy as it'll have failed in patches on the board.
sure I can't tempt you with the whole dash or whole car ?