Posted December 9, 200717 yr Right first off my car is a 1998 escort Si with a 1993 mondeo 2.0 engine, ecu, throttle body, MAF etc etcafter all the headache of the noisy tappets (see noisey tappets thread in this section) I had my car running spot on then 2 weeks later the gremlins came back!!!! my car is an absolute PIG atm. It started out where the car would feel flat after 4000rpm where before it usual 'kicked' after 4k as if a second choke had opened or something, this has gradually got worse and turned into a missifre as if the cam timing is out, sometimes it'll backfire through the pipercross!!!! when it's first started it which in itself can sometimes be a pig it'll idle ok but as soon as you go to pull off it's as if the ignition is being turned on and off and it'll kangaroo all over the place! foot flat down and it sounds like the engine is either being flooded or not getting enough fuel.Had the car on the diagnositic machine at work and it came up with the following Profile ignition pickup erraticHeated oxygen sensor bank 1 weak mixture (strange as there's only 1 lambda sensor)and something about the EGR valve. Now the lambda fault could be down to the car having no cat but still has the lambda plugged in and in the exhaust etc EGR valve fault is because the mondeo had EGR and the escort doesnt as for the ignition pickup I thought it could only be 1 of 3 things, either the cam sensor, the crank sensor or the cam timing out,Tried a known working cam sensor made no difference, tried another crank sensor, STILL made no difference, checked the cam timing and that's spot on too!!!!! Changed the fuel filter thinking it may be dirty fuel causing it, NOPE that made no difference either, changed the plugs, NOPE, tried a set of known good plug leads and still no joy :(Now the only other thing I can think it could be is the coilpack because sometimes it'll drive but lacks power and other times it'll just refuse to drive at all which rules out HG failure although i'm gonna get a compression check done at work tomorrow! Has anyone else had this problem before or have any idea what can be causing the problem?
December 10, 200717 yr Author Bit of an update, tried another coilpack and it's still the same got me puzzled now
December 10, 200717 yr got a lambda to try? can u unplug the lambda and will it run on the default setting if u do that? U tried taking the leads off 1 by 1? is it all cylinders misfiring or just 1? ECU reset?
December 10, 200717 yr Author got a lambda to try? can u unplug the lambda and will it run on the default setting if u do that? U tried taking the leads off 1 by 1? is it all cylinders misfiring or just 1? ECU reset? Aint got a lambda to try but I did try unplugging it and running it but made no difference! Tried taking the leads off one by one and they seem to be working ok, it'll idle ok most the ime i's just when it's under load it'll sound choked and sounds like the rev limiter kicking in at 4k!!!! Tried disconnecting the battery to reset the ecu too, that made no difference either, had it on the fault reader and that brought up the faults above but wouldnt clear them, says needed to be fixed first before they could be reset! Bloody hell carl are you unlucky with this car or what , Bloody tell me about it!!! Bring back my dirty derv, never had a problem with that it just kept going and going!!!! Have you checked all the breathers? Surely that would'nt cause the backfiring etc? if I ease the throittle on rather than planting it it'll stuggle but will eventually reach the proper rev limiter! How many breather have these car's got? checked the small pipe coming from the rocker to the airfilter infact I took it off with the pipercross and ran it thinking it was that that was blocked and STILL it made no difference!!!!! Edited December 10, 200717 yr by Carl160180
December 10, 200717 yr sounds awfully like what was happening with my fucked MAF... as simple/unlikely as it seems have you tried unplugging it and driving the car?
December 10, 200717 yr Have you checked all the breathers? Surely that would'nt cause the backfiring etc? if I ease the throittle on rather than planting it it'll stuggle but will eventually reach the proper rev limiter! How many breather have these car's got? checked the small pipe coming from the rocker to the airfilter infact I took it off with the pipercross and ran it thinking it was that that was blocked and STILL it made no difference!!!!!I had a problem with a crankcase breather, the one that goes to the inlet manifold from just under the exhaust manifold, which had similar symptoms to yours
December 10, 200717 yr Keep us updated, I've got a similar problem, heres a vid of another person with a problem the same as mine: http://s28.photobucket.com/albums/c202/djc...rent=VID011.flv
December 10, 200717 yr have you changed the spark plugs?( my mate had same sort of prob on his jeep and that was problem) also could it be the exhaust blocked in some way?
December 10, 200717 yr have you changed the spark plugs?( my mate had same sort of prob on his jeep and that was problem) also could it be the exhaust blocked in some way?Try'd the cat, had a mondeo in work t'other day that sounded blocked. Put a new cat on it and all was good.
December 10, 200717 yr Author Keep us updated, I've got a similar problem, heres a vid of another person with a problem the same as mine: http://s28.photobucket.com/albums/c202/djc...rent=VID011.flv Sound's very similar to mine, mate will keep ya posted have you changed the spark plugs?( my mate had same sort of prob on his jeep and that was problem) also could it be the exhaust blocked in some way? Changed the plugs and still the same, only thing that can be blocked in the exhaust is the backbox as there's no other silencer's or cat etc and there's plenty gases coming out the tailpipe. I'd certainly be trying it without the MAF... Tried unplugging the MAF and this makes no difference either. i think hes got a de-cat on iirc That's right Nath, it's got a powerflow de-cat on it so can't be the cat blocked. Here's a bit of a breakthrough tho, got my mate at work to have a look cos basically i'm sick of pi$$ing about with it, he checked that the airfilter was'nt blocked by removing it and running it without one which did'nt make any difference, THEN, while I was in the car holding it at 4k where it starts to pop and bang and backfire and miss like a t*at he sprayed some brake cleaner into the MAF (not the best of things to use but was handy at the time) and the rev's shot up and the engine ran sweet as a nut until the brake cleaner vapours had burnt away which leads me to the conclusion that the engine is being starved of fuel, So as we did'nt have a fuel pressure gauge handy to check the pressure we took the fuel feed pipe off the injector rail and switched the ignition on to see what sort of flow the engine was getting, It was coming out but not as quick as i'd have thought, so re-connected that and remove the fuel return pipe off the injector rail and turned the ignition on again and nothing came back out the return ??? Started the engine with the return pipe off and even when the car was revved high there was no fuel being returned to the tank which makes me believe that either the fuel pressure regulator is goosed or the fuel pump, Now this might be a coincidence (sp) but from the start of these problem's the car has had over 1/4 of a tank of fuel in from a petrol station that I don't usually use because of reports of contaminated fuel but at the time I was in a hurry and tonight with the car being just touching the red it seems to be running a bit better ????? Still gonna drop the tank some time during this week and fit another fuel pump and clean the gauze out thats on the bottom of the pump cos it's either like I say the fuel pump, fuel pressure regulator, the little gauze filter in the tank blocked or the fuel lines partially blocked somewhere which will be blown out when the tanks out, SO fingers crossed i'll have an answer to this problem by the end of the week Edited December 11, 200717 yr by Carl160180
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