DESERTXJ206

IV got a 90 renix that has recently been giving me problems starting it.

I know the renix usually takes a few extra cranks to start. I know the key on off on fuel prime method.

Here's my issues: A couple days ago it wouldn't start, no matter how hard I tried it wouldn't. I even tried spraying some starting fluid in the TB. I had 1/2 tank of gas and I was parked on a very slight downward slope with Jeep nose up. I pushed it on flat surface, got a jump cus my battery was dead and while cranking it I had a buddy pour fuel into the TB. After a few cranks it started. Its done that 3 days so far. Same symptoms each time. I get some fuel down there and after a few cranks its sputters to a start.

As I tried to trouble shoot I noticed when I pushed the schrader valve on my fuel rail while cranking the.engine I did not get very good pressure at all.

I have not replaced the pump or fuel filter on this one yet. I was thinking my issues is on of those two. What do you all think?

On a side note, it only does it when sitting over night. I can leave it at work and come back 8 htlrs laylter and she starts up fine but overnight about 12 Hrs is where I get problems.

cruiser54

Probably wouldn't be a bad idea to replace the pump and filter. Do not use Airtex pumps.

NorCalJeep

Could the check valve be bad too? Just food for thought. Mine does the same thing, sometimes.

DESERTXJ206

What is the check valve you are talking about? The one on the fuel rail?

NorCalJeep

The one inside of the gas tank. Inside of the fuel pump.

DESERTXJ206

Well at 4pm I can out on my lunch, Jeep started fine first crank. Just can out at 630 pm to go home and it wont start at all.

Also while waiting for my wife to come down and jump start me I looked into my new(installed in February) 3 core radiator to find this....... super thick sand.

Guess its time to **** my apartments off and use their spicket for a flush.

cruiser54

Can you hear the fuel pump when you turn the key to ON each time?

DESERTXJ206

Not every single time, but I do hear it loud and clear usually after it sits for awhile ill hear UT the first few turns after that I don't hear it. But when trying to crank I believe I hear it almost every time.

Clogged fuel filter maybe?

cruiser54

I'm wondering if the hose inside the tank to the fuel pump isn't rotted.

DESERTXJ206

That's what happened to our 88 Cherokee. The small little rubber hose was completely desintagrated. I ended up throwing a whole new sending unit in it just cus i never wanted to do it again.

I made a dumb move not even thinking, after we got my Jeep running I went and filled up both Jeeps. Guess ill have to drop the tank full and tilt it up to do a sending unit.

I think on Tuesday I will be trying a fuel filter then Thursday a sending unit. Probly doing spark plugs too just incase they are related for a bad spark.

cruiser54

Always do plugs, wires, cap , and rotor together. That's about what the factory recommended anyway.

austinjoe13

Or it even could've slipped off the hardline inside. I had that happen a couple years ago. It took me almost 45 minutes to get it to school that day!

DESERTXJ206

I just did the wires about 2 months ago. I will pick up the other stuff later this week.

Does this change anything ----

With a full tank of gas the Jeep still does not want to start on its own. Last night it finally started. And I drove it about 6 miles, it was at operating temp, I shut it off. Cane out 45 min later and it started fine.

DESERTXJ206

Cruiser why do you not like the airtex pumps? I believe I put a whole airtex sending unit in my 88 last year with no problems. Just wondering.

DESERTXJ206

IV called Autozone, Napa, and o Reilly and they all have the airtex whole assembly unit. That's what I installed in my wife's and had no issue, when I bought just the pump I burnt 2 of them up in one night so I went with the assembly unit and had no issues. The pumps I bought didn't seem to fit into the frame I had in our 88 so maybe it was my poor instal that was why it got burnt up Idk.