skibum9199

Ok, trying to resolve some issues on an 87 na... here goes:

Car will start easily, but once it does it requires blipping the throttle constantly to stay running and runs very roughly. Plugs and wires are pretty new. Previous owner says that he had the car's compression checked and it came out fine. (I don't think so, but ill get tot hat later) So anyways, the car seems to be running on one rotor, since the plugs from rotor2 are usually a little on the wet side, if pulled out right after motor was running. Also, the car runs the same with either just the front rotor getting leading and trailing spark, or with just the front rotor just getting leading spark, or with just the front rotor getting trailing spark. I thought this was a little odd, so i pulled the wires off, one at a time and stuck them near something that was a chassis ground to watch for spark, but couldnt see a spark for any of them. Now, i also had the egi fuse out i believe, which i thought had nothing to do with spark, but maybe im wrong. Basically, my diagnosis is poor to no spark for both #2 trailing and leading. I think that after this happened, the #2chamber was constantly being washed down with fuel, so it likely has 0 compression at this point. My question is, what to do next? How do I test the coil/igniter gizmos?

btw, the computer is giving me a bad tps code as well, so that means even more extra gas dumped in... Also, i did a compression test myself on it and got good results for #1, and absolutely nothing for #2. Nobody needs to tell me I've got a blown motor, im aware that may be the case. I'm just trying to determine what else may be wrong as well. Thanks,

Jesse

Aaron Cake

iTrader: (1)

If one leading plug is firing, then the other is as well. The leadings are two sides of the same coil, so it is impossible for one to fire and the other one not to.

If you are getting a bad TPS code, then that would certainly explain your problem.

skibum9199

Ok, just the tps could do that? wow, thanks aaron.. I hope you're right.. LOL, i kinda wondered that about the leading, since it only looks like one coil... =)

~~I just realized that on my old 86 the egi fuse removed didn't stop it from sparking so nevermind on that.

Well, if thats the case then, maybe the engine is only firing on the #1 trailing? Hmmmmm... I'll get a better tps asap and throw that at it, but i still think it may be more than that.


~~forgot to mention, the guy i bought it from said that it was a bad catalytic converter... although at this point i don't have much faith in him or his mechanic. Also, the 3rd cat smokes after the car has been running for a minute or two. I don't think its necessarily clogged, but i think its just getting loaded up with fuel from the rear rotor not firing at all.

Thanks!
~Jesse

Aaron Cake

iTrader: (1)

Don't worry about the trailing. The car will actually run fine without them.

Easiest way to check the cat is to remove it.

skibum9199

Yeah, i wasn't even going to bother with the trailing if it isnt working.. Now the only trick is getting it to my garage, about 45 mins away... It might be driveable, but its kind of scary with that much gas dumping into the cats.. plus i don't know if that would harm anything else.. I guess trailor it back? To U-haul i go....

thanks for the quick responses aaron, im impressed =)

skibum9199

is the tps the same for all 84-88 13b's?

Aaron Cake

iTrader: (1)

Yep. But the mounting bracket is not.

skibum9199

Ahh, figures.. Hopefully a newer tps and leading coil will fix her up then. I'll keep you guys posted =)
~Jesse