Nay-Sayer Posted October 18, 2005 Share Posted October 18, 2005 I recently purchased a 93 Pathfinder with 180k on it. Seeing as my 95 Pathfinder was recently stolen and winter is upon us - I needed something for the snow - cheap. This was it. Anyhow, the engine is running rough. I got this thing from a Church that resells donated cars for charity so I don't know the history but it looks clean under the hood. Any ideas why this thing is running rough? Thanks in advance.... TNS Link to comment Share on other sites More sharing options...
Casey.T Posted October 19, 2005 Share Posted October 19, 2005 Basic tune up with a timing belt sounds in order Link to comment Share on other sites More sharing options...
Precise1 Posted October 19, 2005 Share Posted October 19, 2005 Sorry to hear that the old one was stolen. I hate thieves, as I'm sure you do also. While a tune up is probably in order (check parts first), look in the Garage/How To section. There will be write ups about checking the ECU codes and how to clean the MAF sensor. This is a good, free place to start diagnostics. Let us know what you find. B Link to comment Share on other sites More sharing options...
Revco Posted October 19, 2005 Share Posted October 19, 2005 I'm not an expert...but it could be a lot of things. Likely suspects would be a need for a tune up, O2 sensor, or possibly bad/loose wiring in one of the engine/sensor harnesses. Link to comment Share on other sites More sharing options...
Nay-Sayer Posted October 24, 2005 Author Share Posted October 24, 2005 Update: Took it to a shop and the guy looks under the hood and observes that it has new distributor/wires/plugs. He then hooks it up to the machine and determines the hesitation I'm experiencing when I step on the gas is caused by the timing being off. The guy says advancing the timing 2 degrees will fix the problem. What do you guys think? Thanks... Link to comment Share on other sites More sharing options...
Precise1 Posted October 25, 2005 Share Posted October 25, 2005 I'd be suprised if it was just 2 degrees on the timing, but it couldn't hurt to have it set right. I'm assuming they did that while they were there ?? Was that 2 degrees advanced or retarded ? B Link to comment Share on other sites More sharing options...
Nay-Sayer Posted October 25, 2005 Author Share Posted October 25, 2005 No, the shop where I took it just put in on their machine. I'm taking the truck back to my regular mechanic to have the timing advanced. Anyhow, the guy @ the place where I took it says the timing needs to be advanced two degrees. What about the fuel pump? Will a bad fuel pump cause hesitation when I step on the gas from stop? Link to comment Share on other sites More sharing options...
Terrano Posted October 28, 2005 Share Posted October 28, 2005 Do you have an automatic or manual transmission? If it is automatic, then it could be a problem in transmission. I did not have this issue myself, but I heard people say this "hesitation" can be an indication of something wrong in the transmission. Link to comment Share on other sites More sharing options...
93blkpathr Posted October 28, 2005 Share Posted October 28, 2005 Will a bad fuel pump cause hesitation when I step on the gas from stop? A clogged cat will cause that too Link to comment Share on other sites More sharing options...
Precise1 Posted October 28, 2005 Share Posted October 28, 2005 Have the timing set properly first... Then see how it is. Then run some injector cleaner. Then inspect/replace spark parts.... Have you run the ECU codes ? Look in the Garage\How to... B Link to comment Share on other sites More sharing options...
Nay-Sayer Posted November 3, 2005 Author Share Posted November 3, 2005 Update: Had my mechanic advance the timing and clean the throttle body. Doesn't sputter when starting from a stop as much as it did before. I'll run some injector cleaner thru it this week. It still idles rough @ startup though. Ran the ECU codes and got 55.... Link to comment Share on other sites More sharing options...
Precise1 Posted November 3, 2005 Share Posted November 3, 2005 Try looking for cracked or loose vacuum lines. Then inspect the dist cap, rotor, wires and a plug or two. If everything seems in order, try changing the fuel filter. B Link to comment Share on other sites More sharing options...
Nay-Sayer Posted November 3, 2005 Author Share Posted November 3, 2005 Try looking for cracked or loose vacuum lines. Then inspect the dist cap, rotor, wires and a plug or two. If everything seems in order, try changing the fuel filter. B The distributor, wires, plugs, and fuel filter are all new. Link to comment Share on other sites More sharing options...
kmgar99 Posted November 3, 2005 Share Posted November 3, 2005 How bout some basic stuff like fuel filter.....Maybe the truck sat for a while and is all clogged up Link to comment Share on other sites More sharing options...
Precise1 Posted November 3, 2005 Share Posted November 3, 2005 Sorry, thats the second time I have said ignition parts when you had already said they were new... My bad ! Still, check all the vacuum lines you can, pulling a plug to look at it cant hurt and consider cleaning the MAF. Here is a link to the simple process... http://www.nissanpathfinders.net/forum/index.php?showtopic=5194 B Link to comment Share on other sites More sharing options...
Nay-Sayer Posted November 8, 2005 Author Share Posted November 8, 2005 Do you have an automatic or manual transmission? It's an Auto trans... Link to comment Share on other sites More sharing options...
Nay-Sayer Posted November 12, 2005 Author Share Posted November 12, 2005 Update: Took the Path to another engine shop and they seem to think the problem I'm having is being caused by a problem with the valves. They suggested that I have a valve job but said before they would know for sure they would need to start the truck while it's cold.... Link to comment Share on other sites More sharing options...
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