Ultima_of_DOOM

HI I dirve a 95 altima GXE and everything has been fine up until today. Well I was driving her as normal and I drove 15 miles after which the idle would drop down to like 200 rpm and then go back up to 800 rpm. After a bit more driving it got more persistant and then she would stall at every stoplight. She would start right back up with ease after each stall so I just drove her home and parked her. I pulled the plugs they looked fine except the #4 cylinder would looked like it was running lean. I am assuming that it is my fuel pump that is going bad or my injectors are clogged because my fuel mileage is horrible I get about 15 mpg . I have 167,900 miles on it, I have changed the fuel filter, O2 sensor, spark plugs and wires. Oh and I don't really drive her hard at all, I actually drive like my mom under 4k rpm and I don't speed or abuse her so i don't understand why I am having problems. Thanks in advance for any help.

cshepard

My 1993 has 158k miles and I get 22 mpg. I have the same exact problem you describe. It only occurs in warm weather. I have changed the distributor, plugs, etc... Even tested the MAF and other sensors and cleaned the Idle Air Valve. I even had this problem before I had to rebuild the engine head but it wasn't as bad. I decided to take the IACV off again and give it a clean and now my idle actually fluctuates in the opposite way. Instead of dropping and stalling it increases. I suggest you clean your IACV for starters as it won't cost a thing other then a few busted nuckles. Be prepared to catch the radiator fluid. I stuck a screw driver in the hose to keep it from leaking anymore.

I did recently order a fuel pump as a few people suggested this may be the problem. I will let you know how that goes.

LONDONDERRY

Yup your right about where the car should be in miles to have a leaky intake manifold gasket. Spray carb cleaner around it while running if the idle smooths out you have a leak.

cshepard

After replacing the IACV the idle leveled out and it does not die anymore. You may be able to just clean yours well and be in shape.