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Author Topic: Misfire under load 2.5 petrol manual estate  (Read 3919 times)

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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #15 on: 09 December 2014, 23:01:20 »

Is code 19 still there?
I don't know. I will check in the morning.
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05omegav6

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Re: Misfire under load 2.5 petrol manual estate
« Reply #16 on: 09 December 2014, 23:06:36 »

Ah ok... only need to unscrew the wiring tray on that... the rest is DBW only to clear space to remove the coil pack :y

The wiring tray should suffice on the earlier V6. Failing Crank Sensor would cause stalling rather than misfiring, plugs, dis pack and the leads, in that order, are the three likely candidates.

My money is on the  dis pack fwiw :-\
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #17 on: 09 December 2014, 23:17:01 »

Is code 19 still there?
New codes. 1 2 1 2 1 2 7 4 7 4 7 4 3 1 3 1 3 1  then repeats.
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #18 on: 09 December 2014, 23:24:40 »

Ah ok... only need to unscrew the wiring tray on that... the rest is DBW only to clear space to remove the coil pack :y

The wiring tray should suffice on the earlier V6. Failing Crank Sensor would cause stalling rather than misfiring, plugs, dis pack and the leads, in that order, are the three likely candidates.

My money is on the  dis pack fwiw :-\
My money is on dispack too, but I have posted more codes; 19 has gone! Now I have 74 and 31.  Are they any help?
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05omegav6

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Re: Misfire under load 2.5 petrol manual estate
« Reply #19 on: 09 December 2014, 23:37:34 »

74 is MAF and 31 simply means you forgot to turn the engine on when you checked the codes :P ie no RPM signal :y
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chrisgixer

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Re: Misfire under load 2.5 petrol manual estate
« Reply #20 on: 09 December 2014, 23:59:17 »

It may have more than one fault. 2.5 3.0 do not record miss fires.

Is code 19 still there?
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #21 on: 10 December 2014, 08:09:10 »

It may have more than one fault. 2.5 3.0 do not record miss fires.

Is code 19 still there?
No, 19 is gone, now I have 74 and 31.
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #22 on: 10 December 2014, 08:18:26 »

74 is MAF and 31 simply means you forgot to turn the engine on when you checked the codes :P ie no RPM signal :y
Thanks. MAF, eh? I must have a spare MAF somehere, and it's easily changed. As mentioned before, I bought this car for spares, but when I found it was so good I kept it and scrapped the other 2.5 estate. I must have all the useful bits somewhere, including the MAF.
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05omegav6

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Re: Misfire under load 2.5 petrol manual estate
« Reply #23 on: 10 December 2014, 09:35:04 »

Un plug it to see if it improves matters :y
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chrisgixer

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Re: Misfire under load 2.5 petrol manual estate
« Reply #24 on: 10 December 2014, 09:45:29 »

It may have more than one fault. 2.5 3.0 do not record miss fires.

Is code 19 still there?
No, 19 is gone, now I have 74 and 31.

Ok good. 31 normal with engine off.

Maf is farely reliable on the pre face lift, so I'd get some live data before condemning that.
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #25 on: 10 December 2014, 17:49:40 »

Thanks for your help, lads, I have found all the bits off the car I scrapped. I have swopped MAF sensors, engine still runs, but I doubt that will cure it. I found all the plugs, plug leads, and coil pack in a bag, labelled. I shall test the car Friday, and if not cured I shall change the lot. I will report back.
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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #26 on: 13 December 2014, 21:19:27 »

Intend to change plugs, leads and dispack. Am dismantling, have changed plugs and removed leads 2, 4 and 6. Leads 1,3 & 5 trapped somehow, and am strugging to remove dispack bolts. Lead no. 6 came off in 2 bits. I did not pull it very hard, honest. Might this be the problem? I drove this car 200 miles yesterday.
Pic of lead follows.
https://www.dropbox.com/s/uvrsqejwsh4cozx/PLUGlead40%25.jpg?dl=0
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Re: Misfire under load 2.5 petrol manual estate
« Reply #27 on: 14 December 2014, 17:07:14 »

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05omegav6

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terry paget

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Re: Misfire under load 2.5 petrol manual estate
« Reply #29 on: 14 December 2014, 21:31:05 »

I have a new problem. There is a broken cable end, middle of picture attached, going vertically down and under the dispack tray. In the cable are two wires, one with white insulation. I cannot pull it up far. I cannot find the other end of it. I have no idea of its function, or how long it has been there.

Has anyone any suggestions?
https://www.dropbox.com/s/oqbfy03iui22snm/looseWIRE40%25.jpg?dl=0
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