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Ya made my own fuel preasure gauge
1.6 l petrol
38psi to 44 psi fuel pump when igition on according to book
So done that but preaure is 0. when i turn the key preasure goes to 44 psi then steadys down to 37- 38 psi when running
Preasure increases to to about 40 to 44 psi when vacuum hose is disconected and returns to normal about 38 when running. when i connect the hose again
When engine is turned off preasure holds at 21 psi for 5 mins but everthing is normal.
I done this test a while back but i remember doing all the test in the book and everthing was to spec.
Quoted From skim3544:
I would say take a look at fuel pressure regulator first.
Finally after nearly a year made a hand held fuel preasure gauge, i know im slow but fuel preasure is 100%
according to spec on book……………….
Fair play to ya for finding the problem and fixing, always good to hear about how problems get resolved.
I had a 1.6 vtec dohc 1992 Had a limiter in it and an oil leak cumming from the top of the gear box thats where the limiter was running off powerstearing fluid my
mechanic tried to fix it but made it worse……… He wasnt a very good mechancic but this might give you sum idea.
Yestorday i gipped the fuel feed line with the vice grips and the car started perfect but then died down due to lack of fuel.
The preasure was really low. Then restarted it just letting more preasure go through and started fine again.
Is this eletrical or fuel preasure?
How sensisitive are injectors to fuel preasure?
.
Ya I know what your saying, but i have my fuel tester connected in the wrong place so readings are off.
Did you try to press the accellerator to the floor when cranking over the car in the mornings to cut the fuel supply to the car mite help if only temporaly….
Well i wudnt know much about that now but i seem to be having the same issues aswell with my ECT once it gets cold it runs real rough i know its a 1996
corolla not a honda. If you check out my thread on Corolla 4afe bad start.
Hi all
I remeber one time a guy telling me about a battery drain he had one time before when i was looking at buying his car he said that his boot interior light was
on all the time think maybe a faulty switch but this was a toyota corolla.
I think i missed sumthing you said to isolate the problem in the fuel leak i never griped the fuel return line and the feed line i just have done it now after changing
the fuel pump, the preasure is now droping very very slow but going down all the time 10 psi every 30 mins…………………………….
Oh ya happy holidays too
Well i disconnected the fuel regulator hose is that what your on about and watched the fuel preasure drop by 10 psi and increase when i put it
back on. I changed that regulator before but i cuold see no differance but i could put the old one back in and still replace the fuel pump anyways? Then try and
solve this problem, and i also appreciate the help im getting so far thanks………..
Also thats a good video on how a fuel pump works.
I was just thinking their my fuel gauge is connected after the regulator so this my work the opposite way??????????????? It was the only way i could hook up
my fuel gauge for readings……………………
I ve also picked up a second hand fuel pump not two sure what engine off but looks to be of spec to mine listed on the book so i mite go and take out my
own pump tommorow and try drain most of the petrol out before i do and disconnect the battery and have a look to see if its similar and if so i will swap to
see how it goes and i will be carefull because i do know it can be dangerous.
Ya it sounds like that aswell to me so is it a good idea to buy a second hand fuel pump or a new one. Only then i will find out the problem at hand if it takes me
out of the woods. Although i did try to hold the preasure and start the car but did not help using a vice grip on the fuel return line or would it make any dent on the
preasure????????
Ya thats true well my my cross referance wasnt great because my fuel measure went off calibration due to it not been able to hold the high preasure when i gripped
the return line (cheap tool) but i could manage to get readings such as when the engine shutdown the preasure would drop and build up when i turned it on
and the results were the same before it went off calibration but i could see that i think their was a drop in preasure of maybe 5- 8 psi before reaching normal
preasure
that is the car started running fine. Thats my own way of telling. But what about too much preasure would that affect the engine when i gripped the return line
with the vice grip engine ran poor. I know its not a great way to test things.
Ya well good advice their eric the car guy, the preasure is holding in the injectors after about five minutes the preasure will drop slowly very slow now and will
continue to drop and just leaving it drop away their now thats with the return line pinched.
When its not pinched the fuel drops straight away..
Now i tried to compensate the preasure gripping the return line with the vice grip adjusting it for the right preasure but not with much success as the car did
start poorly.
So does this mean my fuel pump is faulty and is it worth chancing a second hand one because i can always bring it back if it dont work and try another one
budget is tight.