fuel pump / boost problem...ALL SORTED THANKS LADS
31-12-2009, 09:47 PM
#41
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i dont know how they can be tested, i think its a continuity test across the terminals but i dont know the figures. il dig out my ford workshop manual and have a look for ya.
31-12-2009, 10:12 PM
#43
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i cant find any test readings in my book but would be for a 2 bar anyways so probs no help.
i had a map sensor fail on my last big power saph and that just flooded with fuel so bad it would just idle with the throttle wide open !
it is a strange one your spark must be good with wasted spark set up. have you checked your spark ? mine with msd wasted spark was a massive spark across the plug.
is it a boost cut martin has put in to stop it going over 1 bar until its set up properly ?
i had a map sensor fail on my last big power saph and that just flooded with fuel so bad it would just idle with the throttle wide open !
it is a strange one your spark must be good with wasted spark set up. have you checked your spark ? mine with msd wasted spark was a massive spark across the plug.
is it a boost cut martin has put in to stop it going over 1 bar until its set up properly ?
02-01-2010, 04:14 PM
#45
Me and Rex have been working on the car all day, checked all the sensors and changed the spark plugs to NGK BCR8ES plugs, the only fault found was the phase sensor which had a gap of approximately 0.5/0.6 so we reset it to 0.2/0.3. We also ran a wire through the car to the fuel pump so we could check the voltage while on a road test and also extended the fuel pressure gauge to check the fuel pressure while on boost. We also altered the boost to 22/24 PSI, and then took the car for a test run and seems to be running spot on, so the only thing we can put it down to is the phase sensor, as the voltage on the fuel pump held steady at 13.5 volts. Fuel pressure was steady at 3 bar and went up to 3.5 bar on boost. Thanks for all the info lads in helping me with this problem.
02-01-2010, 04:55 PM
#46
It Wasnt Me!
Phase sensor OR the plugs maybe? 
glad it's sorted mate 
Shouldnt the fuel pressure of went up a bit more though? if it was at 3bar idle, it should rise the same amount as the boost pressure, so should have went to 4.6bar at 24psi?
glad it's sorted mate Shouldnt the fuel pressure of went up a bit more though? if it was at 3bar idle, it should rise the same amount as the boost pressure, so should have went to 4.6bar at 24psi?
Last edited by vroooom ptssssh; 02-01-2010 at 04:59 PM.
02-01-2010, 06:01 PM
#51
Phase sensor OR the plugs maybe?
I dont no mate but well worth Ł10 thanks
and as the pressure i dont no as it did go up to 3.5bar . so this could be the pump letting it down as i dont no wot pump is on the car . i will start a new post and see wot all the lads say about it thanks for your input your a star and i will get you a pint all so if we meet up at one of the meets
02-01-2010, 06:04 PM
#53
It Wasnt Me!
Sounds like a regulator problem, unless the fuel guage wasnt very stable you wouldnt suspect the pump at this stage?
if the pump couldnt deliver the fuel at X pressure, the guage would fluter about and wouldnt hold a stable pressure.
if the pump couldnt deliver the fuel at X pressure, the guage would fluter about and wouldnt hold a stable pressure.
02-01-2010, 06:08 PM
#55
you can do the test static, if you switch the engine off and bridge the fuel pump relay to make the pump run,
fit your pressure gauge and supply a measured air supply to the reference nipple on your reg, the pressure should raise 1:1
so from 3.5 bar at atmospheric pressure, add 1 bar of boost pressure to the reference nipple, and the fuel pressure should be 4.5 bar, and so on.
if the test works fine static,
then the problem is likely to be the injectors are using the fuel up and dropping the pressure
**make sure your pressure gauge is accurate!**
Last edited by JTECH James; 02-01-2010 at 06:17 PM.
02-01-2010, 08:47 PM
#59
right i done the test with the car not running and used a compreser to make 1bar and then 2bar with the fuel pump running with no boost presher it was making 3bar with 1bar of boost the pump was running at 4.5bar and at 2bar boost the pump was making 5.5bar so now wot ????
02-01-2010, 10:04 PM
#60
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That means that your regulator is working properly. By doing the test on an engine that isn't running, you fuel pump is only cycling the fuel through the systems and therefor there is no demand on the pump. Start the car and bring it on boost however and your engine is using more fuel than your pump can supply!
I'd get that 044 bought off Matt Lewis if I was you!
I'd get that 044 bought off Matt Lewis if I was you!
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