Our 1995 nissan maxima started running really ruff when starting
It runs really ruff and someone told me the egr valve is failing, the plugs and wires are new, we just got it a month ago, it was running fine, we ran some fuel cleaner injecter cleaner but still very ruff exspecially taking off, timing is ok to. where is egr and what does it do, and is it hard to fix or replace???
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Not easy to see, but on drivers side of engine underneath intake manifold, so look for airflow intake tube, the larger air tube, and it is just below and to the firewall about middle of engine top to bottom. Hose comes out of it and two bolts hold it in, pretty easy to see once you know where it is located, but difficult to change. Sometimes just cleaning hose out will solve problem. Worth a try to buy EGR cleaner and spray and run a wire inside hose to loosen up carbon.
check your MAF sensor first..thats what it was on my 4th generation Maxima after tearing down the whole tbi system and what not....just pull out the sensor itself and clean it up, see if thats it, if not....idle control valve probably. or wiring.
Let's start by two advil. That is a lot of parts and a lot of money. Have you checked the compression in your engine? That would cause it to run rough. I would also scan the engine for a vaccum leak. Check the throttle body and manifold for leaks as well. Everything else, you have already did.
scan check egr valve make sure its working. check plug wires and vacuum hoses +pvc valve make sure its not stuck open.bad or dirty fuel injections.causes rough idling.if all is good do a compression test to check for weak cylinders or low compression.
It sounds like a clogged catalytic converter. If you can unbolt it; try unbolted it and see how it runs. Also try unplugging the sparkplug wire one at a time and see if the shaking gets worse or stays the same. When you pull a spark plug wire and the car stops shaking then that cylinder isn't firing. Watch out though, you'll get a nasty shock if you do it without insulated pliers. It could be a stuck valve or bad ignition.
No problems with EGR valves/system on this model car. Its located under the throttle body. Your valve is electronically controled by the ECM/Computer. Pretty bullet proof setup. What is the actual code number that autozone gave you?? Let me know the code number and will take it from there.
you don't have to pull off the intake manifold. take the egr off and clean the port is all. then the code has to be cleared.the egr is on the right side of intake(closest to the firewall. you can use a small wire brush or old toothbrush to do this. also check the wires and plug and if you egr valve has a vaccum line make sure it's not plugged loose or missing. use a lil bit of carb cleaner to clean port. replace egr and clear the code a scan tool will clear this code. please rate this thanks