88 4.0 not restarting

[89 MJ]

If I run my 88 for any period of time then shut it off, it won’t restart for an hour or more. It will sit and crank, but won’t fire. We can hear that the fuel pump is running. 
Any ideas?
It is an 88 with a 4.0 and an AX-15. 
Thanks in advance. 

[MiNi Beast]

I'm having same issues currently. Mine has me thinking my head gasket is in need of replacing. But seems more a fuel issue though. Ivd been getting some crackling when shifting, pinging sound, possible bad coolant mix but shifts fine sometimes with out. Still have clutch issues, not quite releasing all the way and weak pedal even after bleeding. Umm. 

But i did just change my fuel filter so checked that after a fresh fill up, and found a gas leak from the return line clamp so tightened that up and was better however the o ring clamp thing is not sitting right and has a leak there as well. Typically can't fill it up more then half at a time. But decided i would and well now gas leaks. I got a buckett cause thats no good. 

So having stalling issues as well, good be clutch disengagememt issues. Or getting hot a few times and with lack of power as well, perhaps its a head issues, valves. Long starts as well as if not holding gas pressure. Fuel pump or perhaps the fuel pressure vacuum regulator.  need to get fuel pressure gage on it and check the s t ats. 

But also i swap back and forth on a coil as they seem to overheat and need a wiggle now and then. Also a swap around fuses and relays as well. 

[89 MJ]

Good thinking and good ideas. Thanks. 

[eaglescout526]

Heat soaked CPS?

[89 MJ]

10 minutes ago, eaglescout526 said:

Heat soaked CPS?

It has the old CPS off of my blue truck. We swapped that first because we thought it was an issue. 

[jdog]

You gotta see if you're getting spark, if so see if it fires with starting fluid. Gotta see if it's spark issue or fuel issue

[scaleless]

 

If it starts with starting fluid, then fuel.  If not, if it has no spark I would scrutinize the CPS.  If it has a weak spark, I would look for burning wires, partially blown fusible links, and an overheating ignition coil.

[89 MJ]

7 hours ago, jdog said:

You gotta see if you're getting spark, if so see if it fires with starting fluid. Gotta see if it's spark issue or fuel issue

 

7 hours ago, scaleless said:

 

If it starts with starting fluid, then fuel.  If not, if it has no spark I would scrutinize the CPS.  If it has a weak spark, I would look for burning wires, partially blown fusible links, and an overheating ignition coil.

Thank you

[Minuit]

That's a classic CPS symptom. In fact, I'd go so far as to say it is THE classic CPS symptom. But yeah, check for spark and then go from there.

[89 MJ]

50 minutes ago, Minuit said:

That's a classic CPS symptom. In fact, I'd go so far as to say it is THE classic CPS symptom. But yeah, check for spark and then go from there.

I’m not saying that it isn’t the CPS, but this is the CPS that I pulled out of my blue truck when I was working on this red truck. I never had any issues with it in the blue truck either. 
In my mind, that crosses the COS off of the list. 

[cruiser54]

Have you ever visited my website and completed Tips 1 through 5? 

[89 MJ]

24 minutes ago, cruiser54 said:

Have you ever visited my website and completed Tips 1 through 5? 

I haven’t had a chance to get to them on this truck yet, hopefully I can soon. 

[cruiser54]

That's a priority!! 

[89 MJ]

51 minutes ago, cruiser54 said:

That's a priority!! 

I will get on those when I work on it next.