Another won't start thread... Starts but doesn't idle.
03-23-13, 01:35 PM
#31
Here's another video, still the same issue. Elbow was removed, that's why it has a strong weird sound from the engine. 0:55 is a backfire. If I remove my foot from the gas pedal, it will die. If I let my foot on the gas pedal, it will also die. I need to pump the pedal.
I'm out of ideas.
I'm out of ideas.
03-24-13, 05:18 AM
#33
I'm sorry I became a little bit crazy about fixing this problem. You are right and I will buy a fuel pressure gauge this morning. I'll report back with numbers.
I checked fuel pressure by removing outlet hose from gas pump and it seemed OK... But it'll be much more accurate with a gauge.
Thanks for your help!
I checked fuel pressure by removing outlet hose from gas pump and it seemed OK... But it'll be much more accurate with a gauge.
Thanks for your help!
03-24-13, 04:28 PM
#34
I borrowed a fuel pressure gauge to a friend this afternoon because no car parts stores had a fuel pressure gauge in stock this sunday. Sadly, the fuel pressure gauge's maximum is 10 psi.
I thought of another way to test the pump.
Jumper F/P to GND, it took 5 minutes 10 seconds to fill 17 litres.
My pump is a 255 LPH, so it should have taken 4 minutes to fill 17 litres. I think that's OK because when I was filling 17 litres, I was working a little bit against gravity.
I'll look for a greater fuel pressure gauge tomorrow but I don't think I'm in the good path.
I thought of another way to test the pump.
Jumper F/P to GND, it took 5 minutes 10 seconds to fill 17 litres.
My pump is a 255 LPH, so it should have taken 4 minutes to fill 17 litres. I think that's OK because when I was filling 17 litres, I was working a little bit against gravity.
I'll look for a greater fuel pressure gauge tomorrow but I don't think I'm in the good path.
03-24-13, 11:15 PM
#35
So fuel pressure at 10 psi. You have a problem. 3 possibilities:
1) Fuel pump is weak
2) You have a massive leak
3) You did not set up your pressure gauge properly or faulty gauge.
How did you hook up your fuel pressure gauge? Was the maximum pressure of 10 psi when you jumpered GND and fuel pump?
-Eric
1) Fuel pump is weak
2) You have a massive leak
3) You did not set up your pressure gauge properly or faulty gauge.
How did you hook up your fuel pressure gauge? Was the maximum pressure of 10 psi when you jumpered GND and fuel pump?
-Eric
03-25-13, 06:05 AM
#36
So fuel pressure at 10 psi. You have a problem. 3 possibilities:
1) Fuel pump is weak
2) You have a massive leak
3) You did not set up your pressure gauge properly or faulty gauge.
How did you hook up your fuel pressure gauge? Was the maximum pressure of 10 psi when you jumpered GND and fuel pump?
-Eric
1) Fuel pump is weak
2) You have a massive leak
3) You did not set up your pressure gauge properly or faulty gauge.
How did you hook up your fuel pressure gauge? Was the maximum pressure of 10 psi when you jumpered GND and fuel pump?
-Eric
The fuel pressure gauge's max is 10psi, so I couldn't have a reading. I can tell that the pressure is more than 10 psi but I can't say more (look at the gauge).
Today I'll try to get another fuel pressure gauge.
03-25-13, 08:36 PM
#46
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38 psi falls in the normal stock range, iirc. Is your IAC still installed? If it is, it may not hurt to give it a good cleaning. Remove it and hit it with some carb cleaner. That should loosen up any buildup that may be causing the IAC to not function properly. Quick process that wouldn't hurt to try.
03-25-13, 08:37 PM
#47
38 psi falls in the normal stock range, iirc. Is your IAC still installed? If it is, it may not hurt to give it a good cleaning. Remove it and hit it with some carb cleaner. That should loosen up any buildup that may be causing the IAC to not function properly. Quick process that wouldn't hurt to try.
Update: I drained gas fluid and I put brand new gas in the tank. Without success.
03-25-13, 08:43 PM
#48
Negative ghost rider. You should be seeing more like 85psi @250rpms cranking speed PER FACE at a bare minimum. You shouldn't have a difference of more than 20 psi per face.
Banzai Racing Compression Test
Rotary Tech Tips: How to compression check a rotary engine
Cranking speed and having the throttle open or closed are major factors for determining compression. Looking at your post you say the throttle was closed. Do another test with the throttle open, but even compression is more important than high compression.
Matt
Banzai Racing Compression Test
Rotary Tech Tips: How to compression check a rotary engine
Cranking speed and having the throttle open or closed are major factors for determining compression. Looking at your post you say the throttle was closed. Do another test with the throttle open, but even compression is more important than high compression.
Matt
Last edited by Mrmatt3465; 03-25-13 at 08:45 PM.
03-26-13, 12:13 AM
#49
Yes 38 is good, but that just mean your fuel pump is good.
Did you observe the fuel pressure after 5 minutes?
Fuel pressure should be no less than 21psi after 5 minutes of sitting.
If it is, then you have a slow leak somewhere.
As for compression test, Matt's got you covered with that video. Yes you need to have a minimum of 85 psi. A good engine compression will typically range from 110-120psi. per rotor.
-Eric
Did you observe the fuel pressure after 5 minutes?
Fuel pressure should be no less than 21psi after 5 minutes of sitting.
If it is, then you have a slow leak somewhere.
As for compression test, Matt's got you covered with that video. Yes you need to have a minimum of 85 psi. A good engine compression will typically range from 110-120psi. per rotor.
-Eric
03-26-13, 05:36 AM
#50
Yes 38 is good, but that just mean your fuel pump is good.
Did you observe the fuel pressure after 5 minutes?
Fuel pressure should be no less than 21psi after 5 minutes of sitting.
If it is, then you have a slow leak somewhere.
As for compression test, Matt's got you covered with that video. Yes you need to have a minimum of 85 psi. A good engine compression will typically range from 110-120psi. per rotor.
-Eric
Did you observe the fuel pressure after 5 minutes?
Fuel pressure should be no less than 21psi after 5 minutes of sitting.
If it is, then you have a slow leak somewhere.
As for compression test, Matt's got you covered with that video. Yes you need to have a minimum of 85 psi. A good engine compression will typically range from 110-120psi. per rotor.
-Eric
After 5 minutes pressure gauge was at something like 32 psi.