Rough Idle, Shaking, And Check Engine Light

[TexasPthFnder95]

Ok so today my truck started shaking severly at start up and had a very rough idle and the check engine light would light up the after about 15 seconds it would clear up light would go off and truck would be normal I really need some help with this its got me stumped i even changed the battery ground because it was almost corroded in half (the wire) i thought it could have something to do with it but apparently not...

[sewebster]

Any trouble codes stored in the ECU?

[TexasPthFnder95]

Any trouble codes stored in the ECU?

 

I havent checked it yet it just started doing this today. And do you mean checking it with a scanner? Or is there another way, sorry ive never had engine troubles before but its probaly something to expect at 231,000mi

[adamzan]

Sounds like what my truck was doing a little while ago. I checked codes (pinned thread in garage, go look) and came up with 51 injector circuit. I waited till I had a 1/4 tank left, put 2 bottles of injector cleaner in and haven't had a problem since.

[Precise1]

Yes, you read the codes by counting the blinking lights on the ECU and then looking them up on a chart. Not the most convenient, but you don't need any tools or equipment to do it, just the code list. That is the best place to start most of the time...

 

B

[TexasPthFnder95]

Yes, you read the codes by counting the blinking lights on the ECU and then looking them up on a chart. Not the most convenient, but you don't need any tools or equipment to do it, just the code list. That is the best place to start most of the time...

 

B

 

Thanks for the help but where can i get the chart?

[sewebster]

http://www.nissanpathfinders.net/forum/index.php?showtopic=21

[TexasPthFnder95]

http://www.nissanpathfinders.net/forum/index.php?showtopic=21

 

Mine was the 51 injector circut i changed the battery ground and connections and put fuel injector cleaner and octane booster haven't had problems with it again... I hope its good to go and it was just a random malfunction

Edited November 18, 2010 by TexasPthFnder95

[nitrohazelton]

I had the same problem in my 95. Same code and rough idle, etc. Just poured a bottle of Seafoam in the fuel tank and drove it like I stole it. Problem solved.

[TexasPthFnder95]

Well i went and had a dianosis done on it and it turned out to be the EGR valve. Now im wondering should i clean this one or pay the $130 for the new one They said it could be an electrical problem or it could be clogged/stuck open

[ahardb0dy]

with the truck running you should be able to press up under the EGR valve ( press on the diaphragm), when it is pressed up it should change the idle, if the diaphragm doesn't move that would be a problem as well

[mooreoffroad]

had the same problem put a new fuel fillter in and havent had a problem since

[Dowser]

On both my previous pathfinders I've owned,(a 91 and 92) the EGR's were stuck. I ended up replacing them both and that particular problem went away.