1990 Cherokee Laredo fuel Pump
#16
Junior Member
If it was me....
Get a loaner fuel pressure gauge and check fuel pressure at rail.
Allow you to test pump and regulator and perform leak down test.
30 psi without regulator and 30 with if memory serves. Only have to remove vacuum hose from regulator to check.
Get a loaner fuel pressure gauge and check fuel pressure at rail.
Allow you to test pump and regulator and perform leak down test.
30 psi without regulator and 30 with if memory serves. Only have to remove vacuum hose from regulator to check.
#17
Newbie
Thread Starter
Yes, there's a history that's what started the fuel pump and filter replacement, but if I've got good pressure in my fuel rail there's no vacuum. I got an inline spark checker and my plug socket and multimeter, I'm waiting for my neighbor to come turn the key for me to check spark. I'll let you know what I find... Thanks for the help.
#19
Senior Member
Join Date: Mar 2016
Location: Oklahoma
Posts: 621
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on
9 Posts
Year: 1992
Model: Cherokee
Engine: 4.0L L6 PowerTech (stock)
Did you have spark?
I don't think that it is likely, but unplug and replug the wire from the coil to the distributor's cap. If you brushed against that while feeding the negative cable to the block, then it could have uncoupled and prevent sparking.
I like to pour a teaspoon of gasoline into each cylinder thru the spark plug holes to test for spark. Sometimes it is very easy to do like on our older Cherokees.
Did you find that the positive lead from the battery didn't need changing also? I've found that positive corrodes before negative corrodes in my experience.
I don't think that it is likely, but unplug and replug the wire from the coil to the distributor's cap. If you brushed against that while feeding the negative cable to the block, then it could have uncoupled and prevent sparking.
I like to pour a teaspoon of gasoline into each cylinder thru the spark plug holes to test for spark. Sometimes it is very easy to do like on our older Cherokees.
Did you find that the positive lead from the battery didn't need changing also? I've found that positive corrodes before negative corrodes in my experience.
#20
Newbie
Thread Starter
Well, replaced the coil, no spark at distributor, tracked back to the crankshaft position sensor, this had about 3" of bare wire so I got a new sensor and went after it, I now have a socket in the bellhousing and I'm screwed... Picture a 5'4" 120lb woman kicking and screaming... ughhh.
#21
Newbie
Thread Starter
replaced the relays, put in new coil, tracked it back to crankshaft position sensor, about 3" of bare wire there so I got a new sensor and went after it, I now have a socket in my belhousing…. I don't know what I'm going to do now..
#22
CF Veteran
Pull the inspection plate off the front of the bell housing. While there may not be enough room to pull the socket out (depending on where it is right now), you may be able to see it and direct a string, wire, magnet. etc. to get a hold of it and pull it back out of the top.
Last edited by Dave51; 06-16-2019 at 03:27 PM.
#24
CF Veteran
#25
CF Veteran
Also please note that I don't write multiple posts instead of a single, complete post just to get my post count up to get to the next level.
#26
CF Veteran
#27
CF Veteran
After you get the socket out don't put the inspection plate back. This will be a good time to check the flexplate condition and flexplate bolts (not like now, but after you get the important stuff done).
#28
Newbie
Thread Starter
LOL... I have no idea what you are talking about when you speak of post points, and I just became active on here so I didn't realize that each reply wasn't direct to person, just noticed that when I came back to check if anyone responded. I'm taking the day off and will start with the magnet to try and retrieve the socket then work from there. Glad this is happening in the summer so I'm not dealing with nasty weather while I'm doing this. God Bless and Happy Father's Day to all of you
#29
CF Veteran
If you can't get a gimmick to work in a couple of tries, it's probably best to pull the starter and pull it out that way.
#30
CF Veteran