HELP I am getting like 14mpg driving on country roads with my cruise control on.
taking of the car is real slow til it gets to a lil above 1200 rpm but its still slow and around 3000 rpm I finally pick up as for the top end well I got it a little aboive 80mph but it didn't want to go much faster.
bad gas milage
Re: bad gas milage (comptronix)
sounds like you have a bad knock sensor. try putting a resistor in the connection that goes to the sensor and see if you have full power after the motor warms up.
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comptronix
- Posts: 6
- Joined: Tue Apr 28, 2009 8:00 pm
- Car: Infiniti J30
Re: bad gas milage (jkudrna)
what kind of resistor and where is this plug located ?from what I have been able to tell , the intake manifold has to come of for the knock sensor to be replaced is there any way to get around that ? Mechanic looked it up in his little book and its said its a 9 hour job .
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kbflip02
- Posts: 837
- Joined: Mon Nov 12, 2007 8:58 am
- Car: 1994 Infiniti J30
2006 Infiniti G35x - Contact:
Re: bad gas milage (comptronix)
check the ecu codes first...my guess its probably knock sensor but dont quote me on that...comptronix wrote:HELP I am getting like 14mpg driving on country roads with my cruise control on.
taking of the car is real slow til it gets to a lil above 1200 rpm but its still slow and around 3000 rpm I finally pick up as for the top end well I got it a little aboive 80mph but it didn't want to go much faster.
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kbflip02
- Posts: 837
- Joined: Mon Nov 12, 2007 8:58 am
- Car: 1994 Infiniti J30
2006 Infiniti G35x - Contact:
Re: bad gas milage (comptronix)
search for knock sensor relocation on 300zx and youll find what youre looking for...i just went ahead and completely replaced the original knock sensor and harness in its location which was a pain to get to...had to pull both the upper and lower intakes to get to it...thats when i got the "while were in there we might as well..." bug...needless to say a 3 days and almost $2k later we were done...also just bypassing the knock sensor with a resistor is only a temporary fix...if you want it to be permanent and not have to mess with it where it is relocate it...best of luck to youcomptronix wrote:what kind of resistor and where is this plug located ?from what I have been able to tell , the intake manifold has to come of for the knock sensor to be replaced is there any way to get around that ? Mechanic looked it up in his little book and its said its a 9 hour job .