2000 Nissan Altima Many repairs, car is worse

Tiny
GUENHWYVAR442
  • MEMBER
  • 2000 NISSAN ALTIMA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 77,259 MILES
In Jan of 08, the service engine light came on, went off, came back on, took it in to mechanic. They did the following on the car: knock sensor, fuel filter, 1 fuel injector, 4 platinum spark plugs, 1 ignition wire set, dist cap, rotor, tune up. 2 days later, light came back on. They turned it off. Came back on. They turned it off again and also adjusted the idle. By the 3rd time they said they could try something else but that would have been another $450 on top of an already $954 bill and there were no guarantees that was the problem either. Now, the car runs fine except that at stop signs/lights, it would "buck". Took it in yesterday, was told 2 of the 4 O valves were letting in air so replaced them. Picked car up and it didn't want to start for mechanic but finally did. Drove it home and noticed when wanting to accelerate, there was a huge hesitation, would not speed up, finally would and drove fine at 55. Went to pick up kid an hour later and had a horrible time starting it again and again the gas pedal did not want to respond to my foot. Took it back to the mechanic. He worked on it for 1 1/2 hours. He replaced 2 spark plugs and when he pushed down on the fuel injector, the engine sounded normal. He suspects it may again be a fuel injector (the 4th one) because when he unplugged the spark plug tubbings, the engine didn't even respond to that one being unplugged. The engine did seem to die down when the others were unplugged. Drove it home but again, now, to start it, I must press the gas pedal to the floor to get it started. It is still very hesitant to pick up speed. The delay is very noticable and also dangerous when you NEED to go and the car does not move. Another mechanic, not having checked the car physically yet, thinks it may just be spark plugs, that carbon built up and won't allow the plug to ignite. ( I hope I remembered that correctly). In any case, my car ran better before getting the O rings fixed. At least then it started and went when I pushed on the gas. Can someone give me sound advice? I just want my car to run like it used to before January. What would now cause the car to not start and not go when the accelerator is pushed?
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Friday, October 3rd, 2008 AT 8:41 PM

7 Replies

Tiny
JACK42
  • MEMBER
If he pushed down on the injector and it ran good, then it sounds like the injector o'ring is leaking, If he took it apart before and only replaced 2 out of the 4, hes not too bright. Try getting it to idle and carefully spray carb cleaner around theinjectors, if the engine changes idle, then there is a vacuum leak. When you say that 2 out of the 4 valves were leaking, what valves are you talking about? Intake, exhaust, if they had the head off the car to replace valves, he could haev missed the cam timing which would make it run like you describe (slow to accelerate and start) I would have another shop do a diagnostic on it. If you have had it back to him to try to remedy this at least twice, and the other shop finds it is something he did wrong, let him know you are going to have the other shop fix it and you will be presenting him with the bill
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Saturday, October 4th, 2008 AT 8:12 AM
Tiny
GUENHWYVAR442
  • MEMBER
My mistake, no valves, only 0 rings. Sorry about that. Just learning terminology. He sprayed around the 0 rings and that is how he discovered there were issues with rings 2 and 4 and he replaced them. Behind the 0 ring number 4, I think it is the fuel injector, he pushed it and the engine ran well. He had also changed the "idle" or timing. Don't know, but in any case, it does not want to go or start now even after he changed the idle or timing back. Forgot to mention, when I put the car in the garage, I had to take it back out cuz it smelled like gas so badly. The odd part is that the engine seems to be quieter, just doesn't want to go or start. I am having another guy take a look at it. I have another car that needs fixed too and now am afraid to have this mechanic do it. In any case, I am hoping to take that car to this other guy too. Curious though, would all of this have affected my gas mileage so badly? Can I actually only hope to get 19 or 20 mpg with a Nissan in town?
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Saturday, October 4th, 2008 AT 9:19 AM
Tiny
JACK42
  • MEMBER
A big part of mileage is driving habits, but if the engine isnt running proprely, the mixture will be off and themileage will suffer. Once again I just dont understand the theory of not changing all of the injector o'rings, that just doesnt make sense to me
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Sunday, October 5th, 2008 AT 7:46 AM
Tiny
GUENHWYVAR442
  • MEMBER
Thanks for all your help. About the 0 rings, I don't know. He said he would be changing out 2 but the bill says he did 4 and I paid for 4. I pray the 2nd mechanic can spot the trouble quickly and remedy the issue.
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Sunday, October 5th, 2008 AT 8:52 AM
Tiny
JACK42
  • MEMBER
If he found a vacuum leak at the injectors, the first guy may have nicked or cut a seal when installing them
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Monday, October 6th, 2008 AT 7:44 AM
Tiny
GUENHWYVAR442
  • MEMBER
You are so on the money! It took another mechanic 4 hours to diagnose car. Learned that the 4th O ring was torn and also the first mechanic had put glue on something( maybe the injector if that makes sense cuz he told me he did a quick fix on it) to make it a band aid fix. All in all, the intake manifold gasket is leaking, vacuum leak, and that is why air and not gas was getting to where it should. They will also adjust the timing when they fix the first listed problem. Thankfully, this mechanic did not charge me for that 4th O ring replacement. I hope I said all this correctly, just trying to remember/repeat what I think they said. Thank you for all of your responses.
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Tuesday, October 7th, 2008 AT 4:51 PM
Tiny
JACK42
  • MEMBER
Glad to be of help. Sounds like you found yourself a new mechanic too!
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Tuesday, October 7th, 2008 AT 5:08 PM

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