Help! I'm not getting any gas to the engine!
04-20-2017, 04:18 PM
#16
CF Veteran
Join Date: Jun 2016
Location: York PA
Posts: 2,929
Likes: 0
Received 5 Likes
on
5 Posts
Year: 2001
Model: Cherokee
Engine: 4.0 Litre I6
pressing the schrader valve with a screw driver and seeing gas squirt out is not indicative of the correct pressure. A pressurized matter (gas or liquid), always flows from high to low pressure. So even a lower pressure than factory spec (49PSI) will squirt out.
04-20-2017, 04:21 PM
#17
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
true, he has not communicated that. I did tell him to check his rail pressure after fixing the fuel sending unit. Hope he actually did it.
pressing the schrader valve with a screw driver and seeing gas squirt out is not indicative of the correct pressure. A pressurized matter (gas or liquid), always flows from high to low pressure. So even a lower pressure than factory spec (49PSI) will squirt out.
pressing the schrader valve with a screw driver and seeing gas squirt out is not indicative of the correct pressure. A pressurized matter (gas or liquid), always flows from high to low pressure. So even a lower pressure than factory spec (49PSI) will squirt out.
I think the poor guy is getting confused.
04-20-2017, 06:02 PM
#18
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 18 Likes
on
18 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Maybe mine is weak or something. Nothing I tried worked until I went to the low volt bulb........ A "Vigorous" spurt indicates better pressure then the alternative. The tester is free though, I hear. Btw guys, his pressure is 39# with the vacuum line off the regulator, and about 10 less with it on, 
Last edited by DFlintstone; 04-20-2017 at 08:14 PM.
04-20-2017, 09:20 PM
#20
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Most test lights are low voltage. No need to tear flashlights apart.
04-21-2017, 12:01 PM
#22
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 18 Likes
on
18 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Actually, not a bad idea! That little pulse that doesn't seem to even light a 12V incandescent isn't gonna hurt you...(much!)
I just noticed my cheap little analogue meter has a 2.5 volt scale. Wonder if it would make the needle bob a little if it were working?
I just noticed my cheap little analogue meter has a 2.5 volt scale. Wonder if it would make the needle bob a little if it were working?
Last edited by DFlintstone; 04-21-2017 at 12:05 PM.