maverick218
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Hi can anyone explain how to check hitachi maf censor preferablyon bench.
maf sensor
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Help Support Nissan 4x4 Owners Club Forum:
i think u can only fully test the maf with it on the car engine running with DVM:thumbs
briggie
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Excellent Pete, now can you find the one for the petrol version as I am pretty sure mine is playing up, Rick
maverick218
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maf test
Hi all i want to test maf as i am working my way round fault diagnostics as car is running bad thought i had found fault when i couldnt get any resistance values on no1 injector but have since found that my one (a zexel injector) can not be test iaw manual as its a piezo syle as opposed to inductive coil. So checked crank position and all is good, disconected fuel supply and run engine direct from can (to rule out fuel lines) and it seems to run but you have to continually prime the primer bulb to ensure no fuel starve. Thought might be something on injection pump but this is the most expensive item if it has developed a fault. I have checked the filter/gauze in pump and i dont have one fitted. Any help welcome as i am nearly done withit now but breaks my heart to see car sent to breakers. Oh yeah and i have the hitachi maf.
Hi all i want to test maf as i am working my way round fault diagnostics as car is running bad thought i had found fault when i couldnt get any resistance values on no1 injector but have since found that my one (a zexel injector) can not be test iaw manual as its a piezo syle as opposed to inductive coil. So checked crank position and all is good, disconected fuel supply and run engine direct from can (to rule out fuel lines) and it seems to run but you have to continually prime the primer bulb to ensure no fuel starve. Thought might be something on injection pump but this is the most expensive item if it has developed a fault. I have checked the filter/gauze in pump and i dont have one fitted. Any help welcome as i am nearly done withit now but breaks my heart to see car sent to breakers. Oh yeah and i have the hitachi maf.
makeitfit
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briggie
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Have you got one for the Hitachi maf though Briggie ?
er no sorry
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no very different, Rick
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if you have a short none leaking pipe from test can to filter and you need to press the prime bulb to keep the fuel flowing then either you have an air leak between filter and pump or the pump is naff, Rick
if the pump is naff its only the lift pump in side as it will run ok if u keep the fuel pressure up at this point in stead of replacing the pump y dont the op fit an inline electric pump then happy days as they r around £40 :thumbs
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sounds good! but does it work? great if it does, but the metering orifice on the return will be deigned to keep the pressure stable re the rate the internal pump pumps, we all know what happens when this orifice/filter gets dirty, I cannot profess to know all the details of this system as I only have had one a few months, but I think there is more to it than meets the eye, Rick
Try checking the overflow valve in the pumpe.
It's a check valve on the return fuel line.
See this: http://www.nissan4x4ownersclub.com/forum/showthread.php?p=131170#post131170
It's a check valve on the return fuel line.
See this: http://www.nissan4x4ownersclub.com/forum/showthread.php?p=131170#post131170
