ef engine missing when under load - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

steve webb · 12-23-2002, 04:55

my ef has a very slight miss when driveing at 100ks or more going up hills. replaced leads (bosh) spark plugs & coil pak is a second hand one that i replaced. Also when stoped in drive it misses every now and again, but put it in to park it goes away

Warrawump · 12-23-2002, 14:43

Gday everyone

Mine idles pretty rough at times but I have been told that it is due to the factory fuel injectors, could it be you have a faulty one or they need a clean? How many k's has it done?

Warra

SiX_iN_a_RoW · 12-23-2002, 22:02

Sound like you may need to get your timing light out and adjust the ignition timing. Mine was missing in drive ( under load ) and I found that it was set at about 4-5 degrees BTDC instead of 10.

Just remember you have to put the car in self test mode before adjusting anything

steve webb · 12-26-2002, 23:11

Hi six_in_a_row

Thanks for your reply. I'm not sure how to put car in self test mode. Can you please explain.

Also I've heard dirty crank shaft sensor could be a problem. Have you heard this as being a problem?

steve webb · 12-26-2002, 23:14

Hi Warrawump

Thanks for your reply. The car has done 150,000kms. I've put fuel injector cleaner in the petrol .

steve webb · 12-26-2002, 23:16

Hi Warrawump

Any other suggestions to cleaning fuel injectors or should I get a mechanic to remove and clean?

61sg · 12-26-2002, 23:22

the only effective way to clean injectors is to remove them and get em cleaned.

the fuel additive may help to keep them clean but if they are causing a miss then additive wont help

steve webb · 12-26-2002, 23:51

61sg

Any idea how much the damage would be to have injectors removed and cleaned.

SiX_iN_a_RoW · 12-27-2002, 00:35

Steve,
Sorry I only know how to do this on EA's, not too sure if EF's are the same.
Near the master cylinder in the engine bay is a single wire ( pink and white from memory but will check ) that you have to earth out. I made up a lead with 3mm autocable, stripped each end, crimped a blade terminal on one end and an alligator clip on the other. Plug the blade terminal into the existing plug under the master cylinder and clip the alligator onto one of the strut tower bolts. Start the car and leave it idle...the revs will automatically increase for about 20 seconds. When the revs settle it is now in self test mode.

Id say someone on here knows how to put the EF into self test

Fairmonty · 12-27-2002, 03:42

I have had my timing checked in an EL and they linked up to wired in the connector in the fuse box