</>Please help if you have any thoughts, I just bought a 1998 tooper with 3.5 DOHC, the check engine light was burn't out, replace bulb, and now I got all kinds of codes, starts with P0171 lean bank1, 0174 lean bank 2, then later 0137 O2 low volts bank 1/2,0157 O2 low volts bank 2/2,1171 don't know,405 EGR low input. I have changed fuel and air filter, and run a fuel injector cleaner lucas, now what? I'm thinking fuel pressure, don't have a guage, and would I check it at the fuel rail, there's a little sherader valve there? Any ideas would be greatly appreciated, won't smog Help </>&lt; src="http://www.google-analytics.com/urchin.js" =text/&gt; </>&lt; =text/&gt; _uacct = "UA-939292-44"; urchinTracker(); </>
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I had a similar problem with my '94 Trooper. I would lose power trying to accelerate on the freeway uphill, then my check engine ligt comes on. Not so sure if it was this forum but a couple of guys suggested replacing and/or cleaning the EGR VALVE.


My mechanic got to clean the EGR valve since the rubber diaphragm was still intact. I believe a new one costs about $120++. Believe it or not, I got my POWER back and the check engine light stays off.
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Tried cleaning EGR didn't work, I now have ordered one, will post if this works, Thanks very much forhelp!!!
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There is also the passageways that need to be cleaned to improve things. Not sure if this applies to your particular engine, but same principle applies.


" The car will not idle correctly, is difficult to start and runs rough much of the time. My truck did not do any of that. I was also told that in many cases, the insufficient flow may be from carbon in the passageways to and from the EGR valve. After some closer looking with a flashlight in hand, I found a plug that has access to the line between the ERG and the cylinder intake. The plug is located below the EGR unit on the left hand side. You will need a set of hex keys to remove this plug. Once I had the plug removed, I had clear access to the horizontal passageway to the engine intake. I quick inspection did show quite a bit of carbon build up within. To clean the passageway, I broke out my gun cleaning kits and used the barrel brushes attached to a 12 inch section of rod. I believe that it was the .40 caliber brush that was the closest in size. I also used the generic carb cleaner in the process as well. This scrubbing did remove much more buildup than I imagined. I installed the plug back in it’s place and have not had a 401 so far. So I believe that possibly could have been the problem. "


Hope this helps.

 

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Thank you, I did clean the port below the EGR, I was told to spray a whole can of carb cleaner in the port while running, being careful not to spray in the little hole(plug this hole, possible fire), (isuzufaq.com). Didn't help, I have a EGR on order should be here today, I've got my fingers crossed, if it dosen't work I'll tryremoving that plug thing. Thanks again
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