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It's been a while, but I finally got the old engine out ready to put the rebuilt one in. I knew it wasn't going to be good and I'm glad the old engine is going for scrap. Exhaust valves not seated properly, lots a resin deposits and nasty orange stuff in the combustion chamber which I think is...

Cheers, I'm confident the head gaskets are fine, or at least they were when I took it off the road to do the job. Should also say that the coil does not get hot and the fuel lines are routed well away from heat sources, so I ruled them out quite quickly. What do you reckon about the howl?

I've talked long and hard with Mark Adams and I'm going to get the hotwire running right. I've fitted a replacement MAF from a Jag XJ40 and now everything is working within parameters. I now have a hot idle but 1. The idle sits at 550 or so and no adjustment of the bypass screw makes any...

Sorry for the delay in replying. Thanks, I've fitted a 5AM from a Jag XJ40 and it works fine.

£50 or £500. One I have, the other I don't.

Having sorted out the issue with my 14CU, are 3AM and 5AM MAFs interchangeable? I hope so as I've just been offered a new 5AM for not much money by a mate who didn't need it. The only identifying no's I have on my MAF are the Lucas 73242A and AFH55-1 which I guess is the Hitachi number.

Cheers. Went out and played this morning. Problem identified. Took voltages across R/B & U/G wires. 0.5V with ignition on rising to 2.1V at idle. About right for an 8 litre engine. So the MAF is duff. Do I get a known good replacement or just go for MS now?

OK, next instalment. it was fouled plugs, all cleaned off and fine. So, we have the basic problem of no post start up map idle or restart. The idle holds for about 5 secs then dies. The hotter the engine gets, the loopier the idle gets, anywhere from 500 to 1500, settling after a bit to about...

Cheers. Will start with the plugs. As it was running so rich to start with, I reckon that's a good shout. I did a complete change over including plenum so everything is 14CU from the valley gasket up. 14CU throttle pot has screw holes not slots so reckon it must be self adapting...

Am just sorting out the snags having finished my flapper to 14CU conversion. Everything fired up fine with a good cold start and cold idle, but no hot start and no hot idle. It's a 14CU not CUX, so running open loop. It was running rich so reduced the MAF to read 1.12V and was just about to set...

Have bought a socket now, Ta.

It's the size of the heads I need. I intend to chuck 'em out once removed and replace with the 3/16 socket cap bolts from real steel.

Am a bit nervous about the complexity of P38s compared to the other stuff I have (SD1 & Classic Saab 900), so prefer to ask before assuming I know then creating an expensive cock up.

Thank you

Simple question really. What size are the heads. Look like a female torx fitting as I can't get my 12pt 3/8 or 10mm socket on them properly, or do I just need a very thin walled socket. Thanks Anthony

Did a compression test. 7 cyls showing a lovely 180psi,1 showing 145psi. A bit of scratching around has also foubnd the cause I think. 7 spark plugs showing a nice brown deposit, 1 looks almost new. First thing I did when i bought it last year was to change the plugs. 7 came out normally, 1 did...

Oh bollocks. Looks like it's time for an uprated cam and lifters then. Will do the test tomorrow when (if) I get home from work and then we'll see.

Thanks. Would that cause the stuttering too?

OK so after I bought a new set of leads to help with the erratic idle and was waiting for them to come, it's developed another problem. Anything more than very gentle application of the throttle and it stutters then starts to backfire if you push down any harder. Fitted the new Magnecor leads...

Have had a ferret around. The pipe to the regulator is fine. Have done a resistance check on the HT leads. In order: 8.37 K Ohms 7.66 9.84 8.28 8.07 11.5 6.62 9.20 Judging by the identification they should be all around 7 K Ohms. Have ordered a new set of Magnecor KV85s. Not my first choice...