bad misfire

[edens-xe]

ive got a bad misfire on my xe nova. ive replaced the plugs leads coil and dizzy cap and arm. ive done a compression check and there all good! im thinking that maybe an injector has gone down but not sure, it seems to clear out though higher up the rev range so im abit miffed about this one. any help would be great as i want to set fire to the car!!! thanks in advance

dan

[Adam]

Just one cylinder not firing?

[edens-xe]

yeh seems like it

[SRI crazy]

you might have a clasic case of air getting into the fuel lines lol

[Adam]

And why would that cause a constant misfire??

[Paul]

figure out which one isnt sparking and go from there.

[edens-xe]

worry over!!! my car is now dead!!! theres no compression at all so i think ive smashed a valve or 2......oh well

[stuartp]

yep reckon that could be the cause of it then. ow well gives you the excuse to tune the replacment engine.

[SRI crazy]

well it would cause a constant misfire coz it is getting more air than fuel but when the revs get higher up it needs more fuel and therefore cant lift as much air as fuel lol