VT idle's fine soon as you rev it / drive it missfires and wants to stall

[chrizza132]

Hi Guys , i need some help with my 98 vt commodore well i was driving home yestarday and all of a sudden i noticed the car had no power had my foot to the floor wouldnt go over 80 i manged to get home then had to go out again but it got worse now the car sounds really bad when you give it abit of throttle and has no power if you push the throttle abit the car will missfire and want to stall


any idea's on whats causing this


Thanks Chris

[JJ08]

change the plugs and leads also check the coil pack undo the wires from the coil and check all the little pins are there if any are missing change the coil pack, i had the same problem and mine was the plugs now it runs fine hope it helps

[pablo]

Fuel pump in it's death throws?....only a guess!

[ephect]

Plugs and leads

When was the last time u changed ur plugs or leads?

[chrizza132]

changed the leads and plugs yestarday cause thats what i thought was wrong with it but it made no change like i said it idle's no problem you can rev it to 3000rpm its still fine if you put your foot to the floor it missfires and stalls also has no power when driving wont go over 20kmh

[nemesis_adrasteia]

changed the leads and plugs yestarday cause thats what i thought was wrong with it but it made no change like i said it idle's no problem you can rev it to 3000rpm its still fine if you put your foot to the floor it missfires and stalls also has no power when driving wont go over 20kmh

did you check the posts on the coils? if they are discoloured or rusty its more likely rooted. could also be the module(the piece the coils bolt to).

[PRAVX II S]

Check for weak spark, if the spark is ok,
I would check the fuel rail pressure while revs are up.

[patrolking]

Best way to check coils is disconnect both leads on one coil pack at a time then start the engine . If the coil pack is good there should be a solid spark between the terminal posts ,if not replace the coil .

[PRAVX II S]

The best way to check the coil pack is actually reading the resistance of the primary and secondary windings to spec
The best way.