engine prob

Level 1 User Joined: 05 Apr 2004 Posts: 29

alright folks,

some of u may remember me having idle problems and stalling at junctions etc.

well the initial problem was very occasionally, and all i had to do was pull over, let it idle for 30 secs and it would sort itself out and then be fine for weeks.

very occasionally the car wouldnt start. only happended on 2 occasions. a bump start started it, and it sounded rough as fuk for about 1 minute or so, then sort itself out and be ok, bar the dreaded cutting out and idling problem. on the last occasion of this, the car never became normal again, and i had the low idle and cutting out problem at all times

Well here is what i did!

changed the fuel filter
changed the ISCV. was ok for a while then back to usual.
also changed the speedo cable and road speed sensor, still the same.

then changed the potentiometer (from another valver, untouched)
changed the throttle body
changed the ISCV (again), after this lot it was much better, after starting the car at first it idled at about 2krpm for a while then sorted itself out and was running spot on for the first 30mins drive, but then started to struggle at idle again, and the revs dropped low still at junctions, but not always to the point that made it cut out.

next i chaged the lambda, still the same.

then changed the cooland temp sensor and timing sensor, seemed much better on idle but after a drive it was the same again.

next changed the ECU for a mk1 clio 16v one instead of a 19 16v one, and also changed the map sensor, and upped the fuel pressure a bit.

now when i start the car from cold, it sounds rough as fuk, when it initially starts it doesnt rev up a little as normal (for like 1 second), it just starts and doesnt go above 700-800rpm sounding terrible (rally slag style Wink

), but after a bit of constant gas up to 3.5krpm (about 10 secs worth) it seems much smoother, but still the revs drop really low after letting off the gas. this is before iv set off!

So after the engine sounds much better, and i drive it, the revs are dropping nicely to about 1200rpm and then slowly to about 900 as it should. no sign of cutting out or dropping revs at all.

once the engines warmed and i start to rev it a bit more over 4krpm the revs then dont drop anymore than about 1400rpm, and it idles at that until the engine is turned off and on again, when it then idles ok at 900rpm.

so in conclusion its much much better, but at first start its sounding rough as fuk, like its runnin on 3 cylinders, then its running ok, but after some gas above 4k revs when driving the revs then dont drop below 1400rpm even at idle

fuk me essay or what! just givin ya the whole story as im really wanting to get this sorted.

since i had the cams in and the engine rebuilt, it was running mint for months, although the cams were never timed, fuelling wasnt setup, and it wasnt chipped (although running mint, and quick as owt). since the rebuild the engine is very lumpy on idle though!

do you think this may be part of the reason?

Cheers for any help!

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

since it was running fine, has anything been done to the car? was it running fine after the rebuild then just started these probs out of nowhere? any garage work at all or did these problems just develop one day?

silly question maybe but is it timed up correctly? not a tooth out or something as this can cause it to run shite, but nevertheless run making u think its something else. what spec cams r they?

done a compression test? hot and cold

checked all leads and sparks and dizzy?

its runs well when guning it does it? just the idle thats a prob?

Level 1 User Joined: 05 Apr 2004 Posts: 29

yeah it was running mint for months bar a lumpy idle, as the cams were in need of timing (and still are)

once running it drives mint as, and rapido, iv changed all the leads etc as well.

iv been told its most likely the PBV now, as this wasnt setup properly just left as it originally was. im thinking of either chucking it, or goin to get it setup properly.

the cars getting mapped by dastek HQ in scotland in a few weeks, so they can deal with the fuelling there, probably wont need the PBV then!

Level 1 User Joined: 05 Apr 2004 Posts: 29

and the problems just occured one day out of the blue. it would sort itself out, then be mint again for weeks, when it would happen again. on one occasion it wouldnt sort itself out and the problem has been from there on!

Level 7 User Joined: 27 Feb 2004 Posts: 243

u own a clio craig, so ur not allowed round here... lol

jimbo

Level 1 User Joined: 05 Apr 2004 Posts: 29

thought as much Wink

Forum Moderator Joined: 18 Feb 2004 Posts: 7432

Yeah, bugger off boyo!

Call the Clio police!

Very Happy

Level 1 User Joined: 05 Apr 2004 Posts: 29

seems like the problem is due to the power boost valve!

that fuker is coming off 1st thing tomorrow morning! bag o wank!

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

aye.....retrun it to std spec....remove all uncertainties....then start to eliminate things...you'll be gutted if it was that all along aftern all the stuff u replaced.

Forum Moderator Joined: 16 Feb 2004 Posts: 1356

Try getting your cams timed

Mr Quoter-vator Joined: 16 Feb 2004 Posts: 7405

i have suggested that....reading the other posts sometimes helps.