Pathfinder 88 Misfire problem #5 cylinder

[anperalta]

Well hello everybody I'm a little new around here since December last year I got my Nissan and now i'm having a misfire problem on #5 cylinder which is making me going crazy........... already check spark, spark plugs, cap and rotor, and is not a fire problem, I don't think that can be a fuel problem because its an tbi injected and al the others 5 cylinders works good.

Make a compression test only in that cylinder and shows 150 psi.......... pretty well, what else can I check for? I'm getting out of ideas and already have 22 days whit this problem...... HELP please!!!!

[Kingman]

150 is pretty low but shouldn't be enough to cause a hard misfire. I'd do a leak down on it, and another wet compression test. How does the plug look?

[anperalta]

I change the plug of #5 with the plug of # 4 cylinder and still have the misfire on #5....... turn 180º the distributor cap changing the post of #5 to #2 cylinder. .... and still misfire on #5.....

[SpecialWarr]

hmm... did you try changing just the wire from #5 to another cylinder? I can't think of anything else other than a basic leak-down test, but is there a timing ring in the distributor like on the WD21? It MIGHT be dirty/ bent or its wire?? I'm just throwing stuff out there man.... best of luck!

[anperalta]

Yes i do change only the wire to.... and nothing... i also remove the valve cover to check for a stuck valve but all looks good to..... so im realy confused.....noob question....what is a basic leak down test??? Jeje any other idea will be appreciated.... saludos....

Edited September 9, 2014 by anperalta

[Rebelord]

Pump it up to 150 psi and let it sit. See where it drops to. Should hold higher than a certain amount. Will be in fsm

 

Sent from my Moto X

[anperalta]

Well its already at the meca.... he will be inspected the egr valve....

Edited September 10, 2014 by anperalta

[anperalta]

Looks like the mechanic it's a little lost to.............. 3 days at the shop and still not found the problem........... is not spark, is not spark, fuel neither compression....... clogged injector? I really don't thing so!

[Kingman]

Leaking intake manifold gasket?