Long crank, then bogged down

Tiny
CHOPS172
  • MEMBER
  • NISSAN ALTIMA
It takes a lot of cranking and then my car will start, if I very slowly apply the throttle it will rev all the way up but anytime I get on the throttle the car boggs down and wants to die and sometimes does, then a long cranking process to get it started again. Changed fuel filter, pump, spark plugs, check distributor, injectors are clicking, pressure tested the fuel tested ok, cleaned air filter, cleaned and checked voltage at MAF sensor, checked compression 125 across all cylinders, checked for vaccum leaks none, checked all electrical connections dry and all connected, also cleared ECU and checked for codes all ok. After all of this car still wants to bogg down and die out any suggestions?
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Saturday, October 13th, 2007 AT 11:05 PM

4 Replies

Tiny
MERLIN2021
  • EXPERT
If gas comprission and spark are all ok, Check you air intake plenum from front to throttle, any unmetered air can be trouble! If that's ok unplug the MAF and see if it improves. If yes replace it. If not suspect the EGR opening too early.
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Sunday, October 14th, 2007 AT 4:52 AM
Tiny
CHOPS172
  • MEMBER
The air intake plenum was fine and when I unplugged the MAF the car died. Turned key and then it started back up, but I have also noticed that when I i hit the gas it will bogg down really quick, make a loud popping sound coming from the intake and some white smoke will come out of the intake. I have a WAI that I have been running for a few years now with now problem. So what does this pop sound and smoke mean?
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Sunday, October 14th, 2007 AT 2:20 PM
Tiny
MERLIN2021
  • EXPERT
Either the timing is off, or you have a worn cam lobe.
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Sunday, October 14th, 2007 AT 3:22 PM
Tiny
CHOPS172
  • MEMBER
Problem fixed thanks.
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Monday, October 15th, 2007 AT 3:12 PM

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