What is it now?!!!!

[J_SULLIVAN]

Guess your just gonna have to part it out! You ever thought about a dying cylinder? Just a very stupid idea 8) Actually I remember hearing something like this and give me time i'll get my P's and Q's together...

 

[nick041881]

check all o0f your grounds on the firewall. mine did wierd stuff like that and it ended up being a broken ground wire for the ecm. just a thought....

 

[TYRODD]

Well, I think I narrowed my problem down quite a bit today. I took the Ty to my mechanic and had him hook it up to a scope, we found that my number 2 cylinder is barely/not firing. I did a compression test, all cylinders are right around 145-awesome! Checked plug, it looks fine to me and had low resistance. New conrad cap/rotor installed last night. Checked the plug wires last night with a spray bottle/pitch black garage-zero arching. Checked my injector harness with a noid-#2 is getting juice. checked injector resistance-5.2 on all injectors. Did an injector pulse test-everything groovy.

WTF?!!

 

[TYRODD]

Any more suggestions guys? Im getting gray hairs now(really)

Ive notice the fuel pump makes a funny sound after I shut the engine off, its almost like its still priming?

 

[TYRODD]

I think I fingered it out,.....

Does this plug look bad?...Didnt think so.

That was the problem, dammit. I cant see any cracks, doesnt look fouled, and no fly turds (cool). Must have just gone bad I guess :-?

Runnen mo betta now! With new plugs.

Thanks all!

 

[jwaller]

no pcv wouldnt cause this. but you may wanna just unplug the o2 sensor so that the ecm doesnt go into closed loop/doesnt use the sensor. if the sensor is stuck rich then the ecm will command a very lean motor and it will run like crap.

 

[jwaller]

splitfire rocks.....

 

[protosy]

i think those are ngk plugs. i have ur5s and they have the same v in the electrode. :-?

chad

 

[TYRODD]

Yes, they are NGK UR5s, I use them for the sole reason that they dont cause the exhaust to pop every five seconds at idle.(picky )

Do any of you see anything wrong with this one, cause I sure dont .

 

[prosty]

NGK plugs are ver sensivite if you've soaked them.. Try NGK BPR6FS (dunno if they're available in US I can send them over to you if you want to They're about $6 each ) or Just regular CRT42's..

Tried switching MAPsensor?

 

[TYRODD]

Actually, the plug was the problem, I just swapped some new plugs in and viola! MAP sensor is new, I did have the previous MAP go bad though. Problem freeness is the shizzle. I do have a little stutter at 3/4-WOT, I think its the wires though so no big deal .

 

[gmcturbo]

i had a simillar problem and i had replaced all ignition parts, just at different times. i put in some ngk's, taylors, and a conrad at one time and it runs like a champ. i think im gonna start replacing ignition parts at oil change like some others here do. (i dont drive my truck much, when i do i drive spirited). but ya ignition, ignition, ignition!

 

[TYRODD]

I think Im gonna go with MSDs 8.5s this time, Ive tried Taylors and like them, but I like to shop around some FYI, I used all 45*/135* taylor wire boots and they fit exellent, would be very hard to fry'em!

 

[gmcturbo]

i went as far as to put some 6 inch boot protectors on the turbo side. also i just switched from the msd's, i like taylors more- theyre cheaper and just as good it seems-

 

[ed hess]

i use boots on both sides and the msd 8.5's

ed

 

[TYRODD]

When I switched back to brand new delco wires, I decided to use boot protectors on them, stock wires are the suck!

 

[Sy769]

I think I fingered it out,.....

Does this plug look bad?...Didnt think so.

That was the problem, dammit. I cant see any cracks, doesnt look fouled, and no fly turds (cool). Must have just gone bad I guess :-?

Runnen mo betta now! With new plugs.

Thanks all!

That proves you can't judge a plug by its appearance. They can look fine but not fire worth sh1t.
My old IH truck was missing on two cylinders. Cleaned plugs and regapped but still no fire. Replaced them and truck ran great again. My father's 4-wheeler went through plugs regularly. He would ride it for maybe 5 minutes to the shop so it never warmed up. For some reason the stock Honda plug would go bad under these conditions. My Honda, which gets the hell ridden out of it still has the original where dad had replaced his after the same mileage.

 

[TYRODD]

Yeah, Im a believer now for sure. Shoot I even checked the resistance of the plug and It checked out OK. I have the plug sitting in the garage as a reminder now . Swaped out the delco wires last week with some MSD 8.5s, Truck runs absolutely flawless now(knocking on wood), like scare the sh*t out of your friends good! \m/ :evil: \m/