Any Idears What To Look For With Ba Engine Miss?

[winton]

Hi all

Got a problem with my ba xr6t I've done some looking around but can't find any post/threads with same symptoms only similar .

So here it go's started with a small miss at idle witch turned it a bad miss at all rpm. Neve happens when cold and it comes and go's .

I got the computer read, running lean.

I track the miss down to number 1 then number 5 injectors not working, that's obvious the start of the firing order too. I'm assuming there is no signal to those injectors when the miss comes on .

One thing I do plan to check is that it hasn't jumped a tooth on the timing chain.

Any other ideas of what could be causing this?

Engine has 135xxx ks on it.

Cheers.

[Ralph Wiggum]

I'd start buy pulling the plugs and having a good look at them (post a pic up here) and then swap the coils between cylinders to see if the fault moves.

If the injectors are indeed dropping out the likely cause it a dud driver in the ECU. Do you have access to test equipment to check for injector firing?

[winton]

Hi. Ralf.

I've already fitted new plug and tested coils by swapping coils to different cylinder made no difference.

My diagnostics tools were limited to a screwdriver, one end to the injector other to my ear can clearly hear other injectors firing and not 1 and 5. But when engine runs good can hear 1 and 5 firing .

Cheers.

[Ralph Wiggum]

Okay, I would move onto the wiring between the Inj and Pcm. Look for damage to the wiring/loose pins.

Do you have a wiring diagram?

[winton]

Ok good idear. No I dont have a wiring diagram, I'll have a look and see if I can find one on the net.

I'm going to pull the engine out soon so I will go over the wiring as you suggested .

Thanks Ralph.

[Kroozin]

I found my dud coil the other day by leaving the car idling and unplugging 1 thing at a time until I found the plug that made no difference when unplugged. Started at coils plugs then was going to move onto injectors. Only need to take it off for a second or 2 and you'll notice str8 away.

[turbotrana]

Ok good idear. No I dont have a wiring diagram, I'll have a look and see if I can find one on the net.

I'm going to pull the engine out soon so I will go over the wiring as you suggested .

Thanks Ralph.

I wouldn't pull the engine out till you sorted it out. There is nothing worse than putting an engine in, chasing gremlins and wondering is it the original problem or a new one that was created.

[winton]

Hi turbotrana

I hear what you are saying and agree, but... I will probably pull it out anyway.

I'm putting it into a Cortina so I will have to go through all the wiring anyway, I will be deleting everything that's not necessary in the loom , abs,traction control, trans etc haven't looked into the wiring side of things much yet , will cross bridges as I get to them .guess the computer will need reprogramming too.

Just looking for people's opinions of what to look for with my engine miss and hopefully get it sorted before I fire it up in its new home.

Some pic to jazz up the thread . the corty it's going in, I'm leaving it as it is just a tidy up. Condition pretty good,only has 154,xxx ks on it , though it's spent the last 6 year's in the weather .

And my poor ba, yes the missing problem was there before the accident .