RazMan
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| posted on 22/1/08 at 02:38 AM |
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Tintop troubleshoot advice please
My runabout Ford Escort's 1.4 SEFi engine starts well, runs ok in the lower rev ranges but refuses to rev under load even with full throttle -
it just doesn't want to go anywhere in a hurry. It will eventually get up to motorway speeds (0-60 in an afternoon  ) but anything like a
gradient and the speed just falls away. I have also noticed that it often stalls when coming up to junctions although tickover is normally nice and
steady.
I have checked the plugs - all a nice biscuit brown with no evidence of oil,
I have also cleaned the idle control valve and maf sensor, checked the air filter and changed the ignition leads. Still no good.
What else can I try?
[Edited on 22-1-08 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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UncleFista
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| posted on 22/1/08 at 02:58 AM |
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Cat broken up and blocking the flow maybe ?
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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907
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| posted on 22/1/08 at 03:12 AM |
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I know nothing of engine management but is it possible that the ignition is too far retarded?
Paul G
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RazMan
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| posted on 22/1/08 at 03:31 AM |
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Morning guys 
I didn't think of the cat breaking up so that might be worth a look after doing the more obvious checks.
According to the Haynes magic book of words, the timing is fixed and you can't even check it - come to think of it that does feel as though it
needs more advance to get it moving. I might take it down to my friendly MOT tester and get him to plug it in to his analyser and see if that gives
any clues.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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907
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| posted on 22/1/08 at 03:54 AM |
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Morning Raz.
I had a Sierra once that wouldn't run above 1/3 throttle.
Turned out that it was a knackered fuel pump.
Paul G
p.s. Not normally up at this time.
Got a stiff neck and can't sleep. (no jokes please)
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RazMan
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| posted on 22/1/08 at 04:13 AM |
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Hi Paul,
I wondered why you were concious this time of the morning. I'm just coming to the end of a 12 hour shift - only two more hours and then
I'm home to my nice warm bed [yawn]
Fuel pump sounds quite likely too ..... but then so does the timing Maybe a blocked fuel filter could give the same symptoms - looks like
I'll be busy later on this morning.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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worX
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| posted on 22/1/08 at 05:06 AM |
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Another thing I'd check Raz, is all the air hoses to and from fueling/air filter points. It sounds like it could be bleeding in somewhere??
Steve
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Gezza
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| posted on 22/1/08 at 05:10 AM |
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If the cat does not rattle when you tap it with your hand check for hairy stuff coming out of tailpipe, could well be the packing from centre or rear
box blocking exhaust, quite common.
gezza
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jollygreengiant
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| posted on 22/1/08 at 05:39 AM |
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Also, DON'T forget to check for crud in the Fuel tank blocking the pre filter.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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Danozeman
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| posted on 22/1/08 at 06:31 AM |
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TPS??
Dan
Built the purple peril!! Let the modifications begin!!
http://www.eastangliankitcars.co.uk
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madteg
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| posted on 22/1/08 at 06:56 AM |
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fuel filter
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britishtrident
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| posted on 22/1/08 at 07:30 AM |
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Points to a fueling problem --- either the fuel delivery choked fuel line, fuel filter, fuel pump, or the ECU MAP sensor, CTS sensor. However I
would also do a compresion test.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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bigrich
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| posted on 22/1/08 at 10:02 AM |
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blocked or part blocked silencers, drop the system at the front pipe an rev it up to see if it improves just dont annoy the neighbours with the noise
LOL. seen it lots of times
.JPG)
A pint for the gent and a white wine/fruit based drink for the lady. Those are the rules
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carpmart
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| posted on 22/1/08 at 11:02 AM |
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Fueling issue - most likely the filter
You only live once - make the most of it!
Radical Clubsport, Kwaker motor
'94 MX5 MK1, 1.8
F10 M5 - 600bhp Daily Hack
Range Rover Sport - Wife's Car
Mercedes A class - Son's Car
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DarrenW
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| posted on 22/1/08 at 11:22 AM |
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Ive seen blocked silencer before. Dont do what my mate did and suspect head gasket and replace it before doing what Rich says and crack the joint open
first at the downpipe.
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jollygreengiant
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| posted on 22/1/08 at 11:43 AM |
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I also came across a Volvo once that kept on stopping. It was the HT leads and a relay, between them they put 22 (YES 22) fault codes on the ECU.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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RazMan
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| posted on 22/1/08 at 12:16 PM |
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Oooh 'eck, so much to check now!
I think I'll start with a trip to my MOT tester and his analyser to see if the ECU will give up some fault codes and go from there. I am leaning
towards a fuel blockage of some sort as it feels like it is struggling to get enough at higher revs. The Haynes book doesn't say where the
filter is on my estate so that's my first 'challenge' before it gets dark.
Thanks for all he input guys - loads of great ideas
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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iank
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| posted on 22/1/08 at 12:28 PM |
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Once went over a speedbump too fast in an empty Sierra estate. Crushed the fuel pipe with similar though even worse symptoms.
I'd go hunting for a fuel blockage.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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britishtrident
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| posted on 22/1/08 at 12:46 PM |
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It's the kind of problem that will produce a lot of fault codes, the only ones that will be of help will be ones that point to a specific
sensors such as the TPS, MAP, or CTS and immediately come back after the codes are cleared.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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RazMan
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| posted on 22/1/08 at 04:54 PM |
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Funny you should say that - the first thing is that a KAM error 512 keeps coming back which suggests that there is an ECU fault. The KAM was erased a
few times and then we did a driving cycle only to get the same error code. The engine does seem a bit more lively now but the tickover is very
unstable - it starts fine but 'hunts' after a minute or so.
There is a possiblity that the Idle Control Valve is so far out that it is messing things up so I will go to the scappy and find another one and
repeat the process again tomorrow.
Bloomin' Fords and there fancy ECUs 
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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britishtrident
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| posted on 23/1/08 at 11:35 AM |
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Hunting was traditionally a sign of weak mixture, but these days with ECU controlled mixture and idle speed it can be other things.
It if nothing is obvious (eg low fuel pressure or flow) then it really needs the live data from the ECU looked at rather than just the fault codes.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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RazMan
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| posted on 23/1/08 at 04:43 PM |
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Replaced the Idle Control Valve with a scrappy one from an XR2 (vroom vroom)and reset the data - it actually seems a bit more responsive now. I reckon
the ICV was misbehaving and weakening the mixture. Still doesn't feel like 75bhp but then its been a while since I've experienced this
sort of power to weight ratio
The tuner in me is now thinking of cheap ways to coax a few more bhp out of this little beasty even though I originally bought it just to ferry bits
of kit cars around and do the 60 mile commuter run ...... will I ever learn?
[Edited on 23-1-08 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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