still can't get RPM over 1500...please help.

1860 Views 11 Replies 7 Participants Last post by johnno, Mar 3, 2010

knie0012

Discussion Starter · Feb 24, 2010

So, I have an 88 Range Rover, 3.5.

It starts after a few cranks, idles (a little bumpy), and when I depress the accelerator, it spools up to 1200-1500 and then bogs out. To bring it back to idle, I need to feather the throttle until it is back.

I have done the following:
plugs,
wires
cap
rotor
coolant sensor
idle air by-pass motor
fuel filter
fuel pump

With all of that, the exact same thing occurs. I have researched the same symptoms, and everybody seems to fix it with the fuel pump...that was my last effort.

Can somebody please guide me. What should I do from here.

Thanks
Jason

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Danny

· #2 · Feb 24, 2010

Have you checked for air leaks, allowing unmetered air into the engine? Easiest way to check is to spray some wd40 or similar around areas that air could leak into - if the revs rise (due to the wd40 burning in the cylinder) then you can track the leak down. Obviously the downside of this is the whole spraying a combustible oil around the engine thing, but you can do the same thing with water spray, and listen for changes to the revs.

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