Misfire underload and misfire when cold toyota 3y

[Bangchong]

It's built into the dissy, so I'm guessing it's an igniter. They're about $50 over here, all this maintenance spending is cutting into my camping gear purchases lol.

To be honest I plan on doing an engine conversion later down the track so I don't want to go to the extent of rebuilding and replacing everything on this engine. Well the things I don't have to at least

[Bangchong]

so I managed to get the specs for the coil so I decided to test it. The secondary side was reading 2k ohms out of spec, I hope this is the culprit. Tim do you think that it could be?

[timsrv]

These things hardly ever test to be within spec. As a result I quit testing them. If I suspect a coil I just replace it. If the problem persists, then I know it wasn't the coil. Coils are cheap though, so no great loss if that's not it. Tim

[Bangchong]

I was just thinking that if one of the ht leads was faulty, maybe it could've caused the coil to fail. I know it's not greatly out of spec but to my knowledge the resistance obviously increases as the coil warms up.

[timsrv]

With old cars it's just a good idea to have some "known good" spare parts around............especially the critical ones. If you replace the coil and the problem persists, there are still 2 positives: 1. You now have a "known good" coil in you spare parts kit. 2. You know your problem wasn't the coil. Sometimes troubleshooting is simply the process of elimination. Having extra parts around can save a bunch of time. Once you know a part is bad, throw it away. Nothing worse than having a bad part laying around...........especially if it gets confused with a good one. Tim

[Bangchong]

Instead of just buying one and giving it a go, I'm going to borrow the one off the forklift at work and test it in mine. The only thing is I have to find the right opportunity when my boss isn't there lol

[timsrv]

Not sure I'd risk my job for the price of a coil...........unless you don't like the job. When I've had the choice to extract one from a parts van (in my back yard) or go to Napa, I chose Napa. Not sure what they cost down under, but here in the US you can get them for under $15 (with free shipping): http://www.ebay.com/itm/NEW-IGNITION...63f563&vxp=mtr

[Bangchong]

I envy how cheap everything is over there. They are $50
in Australia

[Bangchong]

Okay so my results for the leak down test are that cylinder 2 is at 35% which is just out of range. I also put gas into the cylinder and found that the gas was coming out of cylinder 3 when I put it down cylinder 2. This is making me believe that its a blown headgasket.

i have a couple of weeks off over xmas so I'll remove the head then

[AustralianBoyRacer]

Hi all I would be interested to hear about any updates?