Engine skipping - Toyota Nation Forum : Toyota Car and Truck Forums

snowdeity · 05-12-2008, 05:09 PM

I've got a 93 non-turbo, and just made a few changes to it and it's recently been skipping. I bought some pulstar plugs, if you've ever heard of them. High performance, so on, so forth. Anyways. As I was changing the spark plugs out, in one of the wells there was what looked to be a bit of dirty oil coating the well and top of spark plug, inside the cap. But again, this was before I put the new plugs in, and it wasn't skipping before the new plugs. So, I put the plugs in and the idle isn't constant; it's skipping, although the acceleration seems a little smoother. Today I just bought some new spark plug wires and put them in but it didn't solve the problem. Anyone have a clue why it's started to skip? Maybe the oil dropped further down into the well?

4DMR2t · 05-12-2008, 10:34 PM

are the plugs gapped properly? Are you sure all 4 are firing?

***MR2Jedi*** · 05-12-2008, 11:30 PM

Have you also checked your cap and rotor?

snowdeity · 05-13-2008, 02:49 PM

I'm almost positive the gap is right. I thought at first the gap was supposed to be the same as stock spark plugs, but evidently since these are "pulse plugs" I was told to make the gap .040" and I'm pretty sure the cap is fine, not sure about the rotor; and also not sure how to check it. Heh.

aznstylez · 05-13-2008, 03:08 PM

Those pulstar plugs freaking cost alot for one. What else did you change while changing the plugs.

snowdeity · 05-14-2008, 04:34 PM

Ehh, changed the oil. Switched from high mileage to full synthetic royal purple oil. That's it. Then changed the plugs. Then changed the plug wires.

***MR2Jedi*** · 05-14-2008, 11:55 PM

Quote:

Originally Posted by snowdeity

I'm almost positive the gap is right. I thought at first the gap was supposed to be the same as stock spark plugs, but evidently since these are "pulse plugs" I was told to make the gap .040" and I'm pretty sure the cap is fine, not sure about the rotor; and also not sure how to check it. Heh.

I was looking at the BGB, and it states the gap for plugs in the 5 sfe is 0.43 in (1.1mm)
Sounds like a big gap to me, but thats what it says.

snowdeity · 05-15-2008, 01:21 PM

Yeah, that's what I had them gapped at originally, and I emailed a guy about the skipping, he said this:

> That gap in your manual is for a spark plug, this is not a spark
> plug. You must gap this plug at .040. This is a pulse spark and it
> must be gapped to our specifications. This is probably why the car
> is jumping.

And so, I re-gapped them to that. Still jumping though.