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90 XJ Won't start low (15psi) fuel pressure
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CarGuru > Jeep Willys > 90 XJ Won't start low (15psi) fuel pressure 11 February 2005 01:01:04
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90 XJ Won't start low (15psi) fuel pressure

Guest 7 February 2005 08:37:06
 It all started when I smelled gas, a look under the hood revealed some
gas leaking where #1 injector enters the intake. I replaced all o rings
in the rail, it wouldn't start. a depressed shraider valve showed low
pressure in the rail so I replaced the regulator still low pressure and
no start. I installed a new pump, still no start. I purchased a gauge
and after turning on the key it shows about 15psi and bleeds down to
0psi in a few seconds. I have pinched off the return line and it still
only gets to 15psi with a fast bleed down. I have turned the key off
and on 5 or 6 times with the same result. The pump comes on for about 5
seconds every time I cycle the key. Every thing I have read points to a
faulty check valve in the pump, did I get a bad one off the shelf?

Add comment
Guest 7 February 2005 09:15:51 [ permanent link ]
 Thanks for your reply, yes I have fuel but I didn't think to check the
upper clamp and I didn't change the hose. The pump does fire up ok and
I did clean the connectors on the ballast but that wouldn't cause the
fast leak down would it?.Thanks again, I will be checking that hose
connection tommorrow.

Add comment
Guest 9 February 2005 05:17:27 [ permanent link ]
 Well it was a loose hose at the pump, I now have 36 psi and it holds
for hours but the darn thing still won't start, everything is hooked up
right. I did a full tune up and changed the CPS and it still won't
start. It does fire a few times but thats it, any suggestions?

Add comment
L . W . Hughes III 9 February 2005 05:21:53 [ permanent link ]
 Do you have spark?
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

JRK58@MSN.COM wrote:>
Well it was a loose hose at the pump, I now have 36 psi and it holds> for hours but the darn thing still won't start, everything is hooked up> right. I did a full tune up and changed the CPS and it still won't> start. It does fire a few times but thats it, any suggestions?
Add comment
Guest 9 February 2005 05:27:50 [ permanent link ]
 Yes, it does fire when turning over just not enough to start.

Add comment
L . W . Hughes III 9 February 2005 05:34:37 [ permanent link ]
 Your other posts mentions a tune up, like with new wires one hole
off?
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

JRK58@MSN.COM wrote:>
Yes, it does fire when turning over just not enough to start.
Add comment
Guest 9 February 2005 05:40:04 [ permanent link ]
 Double checked and by the book, I have a new thread going please read
it.Thanks for your reply

Add comment
L . W . Hughes III 9 February 2005 06:17:33 [ permanent link ]
 Which looks like: http://www.billhugh­es.com/6fireOrder.jp­g
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com

JRK58@MSN.COM wrote:>
Double checked and by the book, I have a new thread going please read> it.Thanks for your reply
Add comment
Guest 9 February 2005 06:51:12 [ permanent link ]
 Yes that is exactly how my manual shows it, but on my jeep the screws
are between 6&2 and 1&5 not 1&4 and 3&6.Thanks

Add comment
L . W . Hughes III 9 February 2005 09:51:05 [ permanent link ]
 Many caps have number one marked.
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

JRK58@MSN.COM wrote:>
Yes that is exactly how my manual shows it, but on my jeep the screws> are between 6&2 and 1&5 not 1&4 and 3&6.Thanks
Add comment
Guest 9 February 2005 09:55:33 [ permanent link ]
 Thanks for solving my low fuel pressure problem Dave. I changed the CPS
because I had one in my toolbox and have suffered from an intermittent
no start, it never left me stranded as it would always start with a max
20 min wait. I have spark ( a bright blue) from the coil, I have gas
(maybe to much not sure). I have tried the jumper (block to - batt.).
It sounds a bit different cranking than it did before, with a strong
battery it doesn't seem to turn as fast and there is a bigger drain on
my battery, it fires at the begining of the crank a few times and then
nothing.

Add comment
Mike Romain 9 February 2005 17:57:09 [ permanent link ]
 A rotten ground strap wire from the engine head to the firewall can/will
cause no start.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

JRK58@MSN.COM wrote:>
Well it was a loose hose at the pump, I now have 36 psi and it holds> for hours but the darn thing still won't start, everything is hooked up> right. I did a full tune up and changed the CPS and it still won't> start. It does fire a few times but thats it, any suggestions?
Add comment
Guest 9 February 2005 23:50:29 [ permanent link ]
 I should have said it ran great when I parked it, I haven't done
anything with the distributor, just changed the cap and rotor. The #1
is marked on the cap and is in the same position as the book it's just
the screws that are in a different position. I have to admit that when
it's turning over it does sound like the plug wires are wrong but I
have double checked them and when I replaced them it was one at a time.
Thanks for the reply

Add comment
Guest 9 February 2005 23:53:57 [ permanent link ]
 I did bleed the air off, my gauge has a relief valve. The plugs are wet
so the injectors are opening. I'm gonna work on it tonight after work.
Thanks for the excellent advice.........JK

Add comment
Guest 10 February 2005 10:07:05 [ permanent link ]
 Dave, the injectors are pretty quiet, I did the screwdriver to the
thumb in the ear and only heard some faint tapping, a few of them i'm
not sure if I heard anything. I think I will try some tubing to the ear
tomorrow I have a blue spark from the coil, white spark at plugs. I
think it sounds like a few plug wires are switched when cranking, no
backfire but it just doesn't sound quite right. The wires are all in
the right place, do you think it could have jumped time?

Add comment
Guest 10 February 2005 10:33:14 [ permanent link ]
 Mike, I attached a jumper from -batt to the block , good suggestion
thanks

Add comment
Guest 10 February 2005 23:46:09 [ permanent link ]
 Thanks Dave, I will check them out. If the CPS is bad I am told there
will be no spark, is that true? I have white spark at the plugs. I'm
near Seattle, last time I was in Chicago I was at Soldier Field and
witnessed Sweetness break the all time rushing record against New
Orleans, God Bless him.

Add comment
Jerry Bransford 10 February 2005 23:53:44 [ permanent link ]
 JRK58@MSN.COM wrote:> If the CPS is bad I am told there> will be no spark, is that true?

Most definitely.

Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.cox.­net/jerrypb/
Add comment
L . W . Hughes III 10 February 2005 23:58:18 [ permanent link ]
 True. So... put the spark plug wires back in their original cap
holes, one hole forward: http://www.billhugh­es.com/6fireOrder.jp­g
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

JRK58@MSN.COM wrote:>
Thanks Dave, I will check them out. If the CPS is bad I am told there> will be no spark, is that true? I have white spark at the plugs. I'm> near Seattle, last time I was in Chicago I was at Soldier Field and> witnessed Sweetness break the all time rushing record against New> Orleans, God Bless him.
Add comment
Guest 11 February 2005 00:08:30 [ permanent link ]
 Bill, my cap has a #1 on it and that is where my #1 wire is, I'm still
going to try moving them over one.........I'm desperate. Thanks for the
reply...JK

Add comment
Guest 11 February 2005 00:10:17 [ permanent link ]
 Thanks for the reply Jerry. I have a blue spark from the coil and white
spark at the plugs. Is that old saying blue will do and white is right
true?

Add comment


L . W . Hughes III 11 February 2005 00:20:01 [ permanent link ]
 I've never heard of "white is right". I can tell you blue is hotter
than orange, just like we want the color of our furnace's pilot for a
complete burn.
God Bless America, ßill O|||||||O
mailto:LWHughes3rd@­aol.com http://www.billhugh­es.com/

JRK58@MSN.COM wrote:>
Thanks for the reply Jerry. I have a blue spark from the coil and white> spark at the plugs. Is that old saying blue will do and white is right> true?
Add comment
Guest 11 February 2005 02:30:44 [ permanent link ]
 I will when I get home from work, I appreciate all the help, hope I'm
not irritating you guys. Thanks

Add comment


Mic Canic 12 February 2005 19:41:42 [ permanent link ]
 you will find the rotor past # 1 tower when the piston is at tdc almost
half way

JRK58@MSN.COM wrote:
I will when I get home from work, I appreciate all the help, hope I'm> not irritating you guys. Thanks


Add comment
Guest 12 February 2005 21:36:42 [ permanent link ]
 Thanks for the reply, That is where it's at. What are the odds of two
or three injectors going bad at the same time? The thing almost starts.
I have good fuel pressure and spark. If I don't get it going this
weekend I'm going to have it towed to the dreaded dealer.......JK

Add comment


Guest 12 February 2005 22:09:26 [ permanent link ]
 It's closer to #5 Mike. I have checked all plugs and they are wet (some
more than others) and there is fog in all cylinders, of course I
checked them one at a time. Would it be safe to pull the rail out a
1/2" or so and turn it over to see if all the injectors are working?

Add comment
Guest 13 February 2005 13:12:10 [ permanent link ]
 Thanks Dave I appreciate your help..........Take it easy, JK

Add comment
 

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CarGuru > Jeep Willys > 90 XJ Won't start low (15psi) fuel pressure 11 February 2005 01:01:04
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