Guest BAVO Posted October 12, 2009 Share Posted October 12, 2009 Hi I have a 1990 Mk5 escort cabriolet 1.6 efi cvh jerking at low speed, it seems to miss and then pick up again, I have replaced the ISCV and throttle sensor ( the black thing near throttle body ) which has made it a bit better, also done the plugs and leads. You could be doing 30 mph in 4th gear and then it misses and picks up again very annoying, it runs well at high speeds and will go all day without missing a beat. Its done 100k miles and doesnt use oil or water. Today I took the plug of the throttle sensor ( new ) and it didnt make any different when revved up, so maybe its that ? Any other ideas chaps ? Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 19, 2009 Share Posted October 19, 2009 is the coil pack cracked?? only has to be small for them to break. hope you get it sorted, i have the same problem on my mk4 efi, and like you changed tps,leads,iscv and air temp sensor(plugs next) could be emissions fault,fuel pump/relay fault,keep us updated Quote Link to comment Share on other sites More sharing options...
Guest richie29gt Posted October 19, 2009 Share Posted October 19, 2009 would a crack in the manifold also be a factor Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 20, 2009 Share Posted October 20, 2009 (edited) is the coil pack cracked?? only has to be small for them to break. hope you get it sorted, i have the same problem on my mk4 efi, and like you changed tps,leads,iscv and air temp sensor(plugs next) could be emissions fault,fuel pump/relay fault,keep us updated Hi thanks for your advice, about 2 months ago I took it to a garage ( after changing the iscv which made a little better ) The mechanic checked it over with a mutimeter and said the throttle control sensor was faulty, these are not available from Ford anymore so ordered a pattern part. The car was then 95 % better until now when its started to happen again. So last weekend I took of the throttle sensor and sprayed that and the throttle body with WD40 its now a lot better so deffo that is causing the problem. Need to find a good second hand Ford one Ford part number 91XF 9B989 AA, Ford Finis 6539215. Cheers Steve Edited October 20, 2009 by BAVO Quote Link to comment Share on other sites More sharing options...
Guest Cabbytech Posted October 20, 2009 Share Posted October 20, 2009 Hi, take a look on this site, you could prob get one here http://www.autocarspare.com/catalog/throttle-position-sensor/ Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 20, 2009 Share Posted October 20, 2009 Hi, take a look on this site, you could prob get one here http://www.autocarspare.com/catalog/throttle-position-sensor/ Cheers for info but that part number is not on there Cheers Steve Quote Link to comment Share on other sites More sharing options...
Guest Cabbytech Posted October 20, 2009 Share Posted October 20, 2009 Hmmm, that part no doesnt even exist in the Lucas cross reference guide, but i found this one as per your part numbers on ebay lol http://cgi.ebay.co.uk/Throttle-Position-Sensor:-Ford-CVH-1.6EFi-&-Fiesta-RS_W0QQitemZ150356268641QQcmdZViewItemQQimsxq20090930?IMSfp=TL090930151004r22014 Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 20, 2009 Share Posted October 20, 2009 Hi thanks for your advice, about 2 months ago I took it to a garage ( after changing the iscv which made a little better ) The mechanic checked it over with a mutimeter and said the throttle control sensor was faulty, these are not available from Ford anymore so ordered a pattern part. The car was then 95 % better until now when its started to happen again. So last weekend I took of the throttle sensor and sprayed that and the throttle body with WD40 its now a lot better so deffo that is causing the problem. Need to find a good second hand Ford one Ford part number 91XF 9B989 AA, Ford Finis 6539215. Cheers Steve thanks, but mines still struggling, did yours do it all the time?? mines ok when cold, but stutters & hesitates when warm. so i'm thinking emissions or coolant temp sensor Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 21, 2009 Share Posted October 21, 2009 thanks, but mines still struggling, did yours do it all the time?? mines ok when cold, but stutters & hesitates when warm. so i'm thinking emissions or coolant temp sensor Mine was the opposite it was okwhen cold probably cos the choke compenstated. It seems a lot better now spraying the Throttle sensor with wd40 inside. But still would like to find a good 2nd hand one, that one on e bay is a bit pricey Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 21, 2009 Share Posted October 21, 2009 Hmmm, that part no doesnt even exist in the Lucas cross reference guide, but i found this one as per your part numbers on ebay lol http://cgi.ebay.co.uk/Throttle-Position-Sensor:-Ford-CVH-1.6EFi-&-Fiesta-RS_W0QQitemZ150356268641QQcmdZViewItemQQimsxq20090930?IMSfp=TL090930151004r22014 Cheers for that but a lot of money for a bit of plastic lol Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 21, 2009 Share Posted October 21, 2009 changed coolant temp sensor,still the same. so had the emissions checked, running on near enough air only, so richened it up, and its still happening going to try the ecu reset see if that helps. Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 21, 2009 Share Posted October 21, 2009 changed coolant temp sensor,still the same. so had the emissions checked, running on near enough air only, so richened it up, and its still happening going to try the ecu reset see if that helps. Hmm how do you reset the ECU ? And good luck in finding the problem Keep us updated Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 21, 2009 Share Posted October 21, 2009 unplug ecu or disconnect battery (easier access) leave off for a few minutes (i'm going for 30mins) then its something like let the car idle for a few minutes, then take it for a drive using different throttle positions and speeds to relearn its values. Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 22, 2009 Share Posted October 22, 2009 Hmmm, that part no doesnt even exist in the Lucas cross reference guide, but i found this one as per your part numbers on ebay lol http://cgi.ebay.co.uk/Throttle-Position-Sensor:-Ford-CVH-1.6EFi-&-Fiesta-RS_W0QQitemZ150356268641QQcmdZViewItemQQimsxq20090930?IMSfp=TL090930151004r22014 Sorry mate the part number is 89sf-9b989-ab not the one I put on previously, still cant find it any help appreciated Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 24, 2009 Share Posted October 24, 2009 right, narrowed it down to a few things, here we go....Injectors,fuel pressure regulator,tappets(maybe?) idle speed control valve,ecu Dont you just love cars Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 25, 2009 Share Posted October 25, 2009 (edited) right, narrowed it down to a few things, here we go....Injectors,fuel pressure regulator,tappets(maybe?) idle speed control valve,ecu Dont you just love cars Especially elderly Fords ! Expensive trial and error process, cant you get a mobile tuner to find out the prob ? Edited October 25, 2009 by BAVO Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 25, 2009 Share Posted October 25, 2009 tried ringing one, but doesn't have any equipment for older cars, great, especially when the list is getting bigger, so add map sensor to the list. any luck with yours? Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 25, 2009 Share Posted October 25, 2009 It seems it was the TCP found one on e bsy for a tenner from a XR2i. Hopefully that will cure it fully when it comes. ( bloody Postal strike ) Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 25, 2009 Share Posted October 25, 2009 well, mines cured!! Map sensor fault, runs perfect now. Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted October 28, 2009 Share Posted October 28, 2009 well, mines cured!! Map sensor fault, runs perfect now. Congrats Mine is still playing up even adter fitting a different tcp and resetting the computer How did you find the error on yours ? Did you try different bits ? And where is the map sensor Cheers Steve Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted October 28, 2009 Share Posted October 28, 2009 map sensor is on the bulk head, on 2 screws on the plastic heater thing, its a black rectangle with 2 screws either side of it. yeh pretty much trial and error, spent just over £100 on bits that didn't need doing, turned out to be the map sensor which i had in my shed for about a year. hope this helps, steve Quote Link to comment Share on other sites More sharing options...
Guest BAVO Posted November 8, 2009 Share Posted November 8, 2009 map sensor is on the bulk head, on 2 screws on the plastic heater thing, its a black rectangle with 2 screws either side of it. yeh pretty much trial and error, spent just over £100 on bits that didn't need doing, turned out to be the map sensor which i had in my shed for about a year. hope this helps, steve Ok ta thanks, do you have a spare one I could try ? Also any idea where the IAT sensor is, I know it should be on the air intake before the throttle body and MAF but cant see anything Cheers Steve Quote Link to comment Share on other sites More sharing options...
Guest suffolk04 Posted November 8, 2009 Share Posted November 8, 2009 its on the inlet manifold. if you look at the engine head on from the front, its screwed in on the right hand side with a multi plug connected. I dont have a spare one i'm afraid, but have a look on ebay for ones being broken, you could buy from ford, but they cost £210+vat Quote Link to comment Share on other sites More sharing options...
Guest honeywheels Posted November 8, 2009 Share Posted November 8, 2009 hi guys and any ladies . like yourself i am having the same type of problems with my honey. does any one now wher i can get a purge solinoid valve for a 1.6efi cvh 1990 . i hear that ford charge 80 pound to put the car on the computer and it tells you what is wroung i think i will end up trying it Quote Link to comment Share on other sites More sharing options...
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