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2001 Mazda Tribute Question: Starts fine when cold but will not idle and it stalls until warmed up.

 

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quality hammer, Santa Rosa Beach, FL, February 08, 2013, 09:37
 Rookie

Problem only when cold. Have friend run codes with his machine and we have replace numerous parts including O2 sensor, vacuum lines, throttle control valve, and new plugs & wires. nothing has solved the problem.

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  • Answer #1

    February 08, 2013, 10:08
     Master

    I agree with greg we need to get codes

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    quality hammer, February 10, 2013, 09:17
     Rookie

    See my detailed reply below I updated. After 30 miles of driving the check engine light came on.

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  • Answer #2

    Greg's Orange Auto (14277 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 08, 2013, 12:54
     Master

    do you have any eng codes if so post so we can adv

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    quality hammer, February 09, 2013, 12:12
     Rookie

    We have replace egr valve & solenoid, cleaned mass air flow, replaced IAC, both O2 sensors, DPFE, and new plugs & coil packs. All intake gaskets have been replaced. No vacuum line leaks. Read codes last night after a week of driving. PO171 system too lean band 1, PO174 system too lean band 2, PO401 EGR flow insufficient. We put a gauge on the fuel pressure rail and got 60+ lb. Fuel pump was replaced several months ago. When engine was turned off the gauge lost a lb a minute and was 0 after an hour. Could this be a bad injector? We cleared the codes and let set overnight. Started this morning and had the same problem. Surging and would not idle unless RPM's were over 1,000. There was a popping noise in the engine during the first couple minutes of running. It stopped as engine warmed up. After 15 minutes it would finally idle but the engine was still surging. It always has that surging even after warm up and at higher RPM's. The codes did not reappear this morning. They will reappear as the car is driven.

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    goodguy, February 10, 2013, 11:05
     Master

    you ould have an injector leaking down and flooding the one cynder

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    globalhelper, February 10, 2013, 16:09
     Master

    and plugged on other cyl.

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    quality hammer, February 11, 2013, 06:00
     Rookie

    Do recommend replacing the injectors?

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    goodguy, February 11, 2013, 10:20
     Master

    if you find the one that is leaking I would replace it and then run a can of injector cleaner through it

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    quality hammer, February 11, 2013, 13:25
     Rookie

    How would you identify the problem injector?

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