missfire, changed everything, still there

hi sorry to add another thread,

ive got a 98 (S) range rover 4.0 v8se

i had a missfire, i looked over it an leads an plugs looked liked they could do with changing, so did, still no change, so changed the coil packs, an still got a miss fire, an get a heavy fuel smell, any idea's

im sure i got it set up right,

coil is like so.

2 3 4 7 8 5 6 1

left---right
8-----7
6-----5
4-----3
2-----1
front

ive got a lead going from 1 to 1, 2 to 2 etc etc

Could be:

Mass Air Flow meter
Crank/Cam shaft position sensor
Lambda Sensors
Split Induction Pipe

Failed Head Gasket...!!!

Have you had it on a Diagnostic Machine, as this could point you in a direction....

i havent yet, gonna have to i think, was hoping to fix it with out,

It dosen't happen very often these days but a burnt out valve could cause it so get compression test done

knowing my luck thats what it is,

Mine had a head gasket go across 2 cylinders, gave the same type of thing you describe.

think i'll call in my local garage tomorrow an get it looked over.

well got nw leads coil pack an plugsan fuel filter, still not right, going in to james tennant on wednesday to get sorted, it drive but spluttery an no power, doing my head in

Never fear, gentleman James will sort you out. Mine was in there today for airbags and they did a great job in no time at all.

well sadly it was the head gasket, so left it with then to sort ut for me, oh well at least its in good hands.

kieronf said:

Never fear, gentleman James will sort you out. Mine was in there today for airbags and they did a great job in no time at all.

Click to expand...

Come on your letting the side down, you couldn't have a crack at doing them yourself? but then I heard you got bags of ££ laying around

Hi ya had all the same symptoms. Had compression check done, O/S bank all at 150PSI, N/S bank had one at 150PSI and the other 3 around 50-60PSI.

Head taken off and voila, there was the problem!

well its only f-ing playing up again, over heated on me again, was told it looked like an airlock, oh an the pressure cap felt abit dodgy, so got a new one, topped up the water via the top hose, then everything seemed ok,

pick up a plant trailer the other day to go pick up a roller, drove for a few miles, all ok, sat in traffic for quite a wile, everything ok, started going up a slight hill an temp gauge went right up in the red, to end with light on,

now im hoping its just a sensor, which i got, but thought ide get a new thermostat as well, (there wasn't one in there) one off the bolts only snapped, :hurt:

p38 onwership is doing my sweed in at mo.

Don't the V8's use a Thermostat in a plastic fitting in the hoses near the bottom of the rad?? or is that the 4.6 only??

not sure, i'll have a look, thats where i was told it was

think u could be right m8, just seen another thread on hear. many thanks

wish i looked on hear first about the location, its being a nightmare,

i just noticed that on off the rubber heater matrix pipes, (one that goes to engine) is leaking a little where it joins engine, would this couse me problems with air locks etc

well, thought ide give an update, my prob ended up being head gasket, so got that done at a garage, i said do both side's, they said only one needs doing anyway they did one an been having prob ever since, changed- rad-water pump-thermostate, nightmare,

anyway its in my garage now an me an a m8 are going to do the head gaskets, so im thinking about super charging it, anyone done this, an is there a manifold out there, (saves me getting my m8 to build one)

also is there anywhere i can buy 2 new heads, ported an polished ones,