Missing and holding back.

Just got it back from the garage and they don,t have a clue so thought i would ask on here.

Car is a 1999 4.6 hse. 62 K and on LPG. Its missing both on Petrol and LPG. We have been running the car on lpg only for 2 weeks , couple of hundred miles with no change.

Recently had plugs, leads and coil packs.

Any ideas ?? HELP !!!!

masonsjeep said:

Just got it back from the garage and they don,t have a clue so thought i would ask on here.

Car is a 1999 4.6 hse. 62 K and on LPG. Its missing both on Petrol and LPG. We have been running the car on lpg only for 2 weeks , couple of hundred miles with no change.

Recently had plugs, leads and coil packs.

Any ideas ?? HELP !!!!

Click to expand...

MAF possibly, if its holding back

Any ideas what would cause it needing re-setting. Just had bettery off for a bit. Back on eka code in and now runs fine .
Weird.??

Bad earth most likes

Would that be the battery to earth or another 1.??

Have you checked the fuse box under the bonnetby the battery this fuse box seems to have a life of 8 to 10 years and corrodes as do all the earths and the cables from the battery to starter and alternator and if the electrics are not spot on all sorts of odd symptoms appear it just seems odd that after the battery out and in it runs fine so my suggestion would be electrics as opposed to resetting - as was suggested might be worth cleaning the maf hope this helps

I'll have look at the fuse box etc in the daylight in the morning. Its been fine for 3 months.
Yes i know, its a P38 !!

The fuse box wont show too much but look under the relays and smell to see if it has a burnt smell these are all things you may need to do over time I did so good luck