escort cosworth irratic idle and hesitates when warm??
#1
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From: poole, dorset
escort cosworth irratic idle and hesitates when warm??
ive just rebuilt my head on my 1992 escort cosworth, new valves ect.. put it back together 2 days ago when it started from cold it runs perfect and drives fine but as soon as it warms up slightly idle goes up and down and its hard to drive it holds back when accelerating and slightly misses lack of power!!! its running stage 3 by the way!!! from stone cold its mint but after 5 to 10 mins it does this any one help please?? all sensors are new and timming is spot on the fault is obviousely temp related????
#3
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From: poole, dorset
#5
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From: poole, dorset
ok then any ideas?? cos im lost now!!! i thought it could be a lazy pump or pressure reg fault?? is there anything else any1 can think of ?? obviousely increasing fuel pressure sorts it out??????
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From: poole, dorset
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#8
air leak will cause all sorts of idle issues,
increasing fuel pressure will mask the fault as it will run rich, just like it does on cold start when you say it is ok.
pressure test the inlet from the turbo up.
set the base idle when hot with the iscv unplugged via the base screw under the throttle body.
check fuel presure is 3.5 bar with the reference pipe off and blocked,
is it on p8?
increasing fuel pressure will mask the fault as it will run rich, just like it does on cold start when you say it is ok.
pressure test the inlet from the turbo up.
set the base idle when hot with the iscv unplugged via the base screw under the throttle body.
check fuel presure is 3.5 bar with the reference pipe off and blocked,
is it on p8?
Last edited by JTECH James; 12-12-2009 at 07:58 PM.
#9
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From: poole, dorset
ok thanks, i will test it asap, it was fine b4 i rebuilt the head so its got to be something i touched!!! also it does hold back and wont accellerate properly when it plays up?? almost a missfire!! but not if you know what i mean??
#13
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From: poole, dorset
hello mate yes ive checked everything its doing my head in!!!!!!!! must be air leak or fuel pump thatas all i can think of, its just weird that its ok when its cold!!!and it runs perfect with the return fuel hose clamped off!!!
Last edited by adam escort cosworth; 13-12-2009 at 04:26 PM.
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