5.0l Started shuddering/shaking while driving and sounds like Arse.

[Deneo]

hey guys
Was just dropping a mate off and got halfway home and a wired problem started. it's shaking like no tomorrow when i accelerate and also when the car is parked and i rev it. sounds like it's missing big time but i just did plugs/leads/rotor B and Dizzy cap.
This car is just problem after ploblem.
Thanks for any help guys.

[RX25SE]

Coil?

..........or rear springs too low.

[Deneo]

Lmfao, The springs are back in.

How can i tell if the coils on its way out?

[Blakvsexec]

LMFAO, Just imagined your car driving down the road sounding like arse, PFFFFFFFFFT , PFFFFFFFFFFFT, LOL LOL

[RX25SE]

Braking down/missfire under load.

You could also test the primary and secondary resistances.

Primary should be about 0.42-0.47 ohms
Secondary about 6000-7300 ohms

[TheIceman]

stuffed hall effect sensor in dizzy or you have the dizzy out a tooth and the rotor isnt lining up with the plug lead and cross firing.

[Deneo]

I can hear braking down through the exhaust. How can i tell if the dizzys a tooth out or if the hall effect sensors dead? cheers. Was running like a dream, Then i was just driving down a main road and it started. :/

[Not_An_Abba_Fan]

Could also be a dodgy plug or lead or even a lead that isn't on properly.

Using multigrips, pull each lead off the plugs one at a time while idling and see which one makes no difference to the miss. If you can hear the lead sparking to the plug when it is just off it, then the chances are you have a bung plug.

[Deneo]

Yeah, It's happening intermittently because i was sitting at the servo before and it was starting and stopping, Got half way home and it started again.
Sounds coil related?

[bandit10]

is your coil still on the back of the block?

[Deneo]

I think it's on the firewall.

[bandit10]

if its on the fire wall, it will be nice and easy to get to and has more than likely been changed at some point. Pull it off and see if you can see any cracks in the casing?
My coil died on the ss a while back and that had a small crack in it, before it died completely it was missing quite bad.

[Deneo]

Yeah thanks bandit.
I did what abba said and pulled each lead off to see which was misfiring and It's Cylinder 3 witch is second on the drivers side.
it's firing out of the top of the dizzy cap and out of the lead into the plug? So faulty plug?
The only thing turning me away from faulty plug is the fact that i start it sometimes and it runs like a dream! Then 5-20 mins into the drive it starts missing again :S

[bandit10]

So swap the plug with cylinder 2 plug.. and see if it still does the same.

[Deneo]

Will do tomorrow mate, Cheers.

[Deneo]

Swapped it over, Still happening. Where to next? Clogged injector?

[BlackVXGTS]

Could be a crook lead or perhaps the lead isn't properly secured on the distributor cap. Did you use the recommended method of wiring the leads onto the distributor or did you just the laissez faire approach (anything goes)?

[Deneo]

Pretty sure i used anything goes haha. but it's seated nicely, iv'e also changed the lead to the old one and still the same.
I gave it a squirt around a corner before and straight after that the problem started again, But was fine for an hour or so before hand.

[RX25SE]

Dud coil???????