ENGINE HESITATION ?

[coolchris]

Hi,

My car has started to show some funny symptoms overt the last day or 2.When driving car runs fine and a couple of times all of a sudden the engine has nearly stalled followed by a kangarooing jerking motion this only lasts a little while then the car seems to run fine but it has happened un predictably on me a couple of times could it be fuel pump ? hoping its not ecu related.Just to note car has new plugs/ht leads/coil pack/crank sensor cam sensor and cleaned air filters.Any help or advice would be much appreciated.

Cheers

Chris

[coolchris]

You think its a connection issue then Adrian ?.If the car was connected up to a lap top would it show the problem ?

[coolchris]

Well the car had a new battery fitted within the last couple of months so not sure it could be that.Took car out friday night started car drove about 100yards then the engine coughed followed by this jerking symptom for a couple of miles after that it ran fine till I came home then it done it again all be it momentarily.Then went out Saturday afternoon drove 25 miles car ran spot on no tell tale symptoms then as i was stationary the car just died.After this started the car everything appeared fine but 100 yards up the road jerking symptoms again seems to do it at lower speeds if I give the car a bit of beans it clears through and is then fine.Its really puzzling as it does it randomly not sure what I should be checking looking for ? was thinking of running some fuel cleaner through system (thats if its not electrical)certainly wont do any harm

[coolchris]

Hi Mike,

The crank and cam sensors were replaced with intermotor ones from e bay(for a 2.5 mondeo)car has not had a new alternator just battery.Would just be nice to put my finger on it as can be a pain driving fine one min then playing up

[coolchris]

I have had an alternator fail on me before and I remember the battery light on the dash was illuminated till I got it replaced.I am thinking along the lines of Rob I am guilty of letting the car run low and the symptoms happen randomly one min driving fine then it jerks and hesitates

[coolchris]

Ok had fuel filter cleaned and car seemed fine then 3 mile down the road same symptoms loss of power(like the cars cutting out and lots of hesitation/jerkiness.Car runs spot on all other times im bloody puzzled to be honest any other ideas guys ?

[coolchris]

Okay ran some fuel cleaner through the car and had the fuel filter cleaned drove the car and within 5 miles same symptoms so back to square 1. Pulled out every relay/fuse checked all fine took out new crank and cam and put the old ones in.car ran a little lumpy(thats another post) but took it for 2(prob 10 miles or so) runs and no sign of those symptoms so hopefully the problem has gone but only time will tell ?.