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1993 Ford Ranger Running Rough

Tiny
ZCRASHZ123
  • MEMBER
  • 1993 FORD RANGER
  • 4.0L
  • V6
  • 4WD
  • MANUAL
  • 237,537 MILES
Having issues with my Ranger. I took it into a shop about 2 months ago to have some trans work done, well it ran fine when I dropped it off. It sat for two months before I could get it out, had some family issues, when I picked it up, it started but as soon as I went to leave it jerked and stalled. Shot some starting fluid in and fired up, I made it less than two miles and it died again at a light. Pushed it in parking lot, changed plugs and wires, air filter, pcv, vacuum hose from the canister on wheel well to solenoid. It now will idle somewhat normal just above 500RPM, I can run it up and down the driveway ok (about 8ft) but as soon as I go to get on the road and take off, it bogs way down, RPMs drop to maybe 300 and it shakes I give it some gas, and sometimes I can keep her running, but usually it dies and wont start, I did try this lastnight, where after it stalled out I turned key on and off a couple times to kinda prime it, and it hesitated but it did start, rough, but it started. I am quite irritated that it ran fine when I took it into the shop, and now after sitting for less thn two months I have this issue. I bought a fuel filter that I am going to attempt to put on it as it cant hurt either way, Do you think this is the issue? Or did something else happen while sitting? Any suggestions what to check? I am not sure of the miles it only shows 37, xxx so I dont know if it is 137k or 237k judging by the age I am guessing 237k.
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Tuesday, July 7th, 2015 AT 5:28 AM

14 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge auto parts rent it.
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Tuesday, July 7th, 2015 AT 6:43 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok, I will try to do that tonight when I get home. What should the pressures be?
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Tuesday, July 7th, 2015 AT 8:52 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Key on engine off 35-45 psi 35 minimum
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Tuesday, July 7th, 2015 AT 10:03 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok, thank you, will post when I get readings
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Tuesday, July 7th, 2015 AT 10:05 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
OK so I still haven't had a chance to check the fuel pressure. However, I have had a lot of suggestions being the fuel pump/sending unit going bad or corroded. Does this sound feasible? I was thinking I may try to get the bed off and take the unit out and just do a visual inspection. The two bolts towards the cab are being very difficult, sprayed PB blaster on them two days ago, still no luck. Tonight (providing the rain gods show some mercy) I might just cut in an access panel in the bed and pull that sucker out that way, if that could be the issue. Seems to idle better after an oil change and new fuel filter, but under load it bogs and stalls. I also forgot to mention that when it starts bogging down, the battery level indicator jumps around, not sure if that means anything other than with the bogging it cant keep up with the alternator or whatever.
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Wednesday, July 15th, 2015 AT 7:58 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You ys create your own problems check the pressure first like I said in first reply don't try messing with something you don't even know is bad.
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+1
Wednesday, July 15th, 2015 AT 9:31 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok
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Wednesday, July 15th, 2015 AT 10:15 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok, so I finally got the $150 to rent the pressure tester, hooked it up and am getting a reading of 30 psi
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Monday, July 27th, 2015 AT 1:41 PM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok, I lied. I didn't read your instructions fully. With key on engine off I get 35psi
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Monday, July 27th, 2015 AT 1:43 PM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
I am noticing when I turn key off it drops back down to just under 30psi
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Monday, July 27th, 2015 AT 1:45 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it drops more than 5 psi in 60 seconds then the fuel pressure regulator may be bad as it should not do that. So recheck it. Also if gas in vacuum line leading to regulator replace it as well.
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Monday, July 27th, 2015 AT 3:30 PM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Yes it dropped not much more than 5psi but a little and it was well within 30secs. It's also hard to start now, like it fires and dies right away, and unless I turn key on/off about 3-4 times I can't get it to fire. But once it runs and I rev it at about 2000rpm for 30-60seconds and then it'll idle around 600 rpm but a little rough. I disconnected the iac and started it up, it idled right at 500rpm, plugged it back in and went back to 600-700rpm. Trying not to get ahead of myself, just getting frustrated.
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Monday, July 27th, 2015 AT 4:50 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Eck for a vacuum leak or if you have a vacuum line going to map sensor and it's soft replace it then check egr passages for partial plugging and same with egr valve. Other than that I don't know what to tell you I'm out of suggestions.
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Tuesday, July 28th, 2015 AT 5:49 AM
Tiny
ZCRASHZ123
  • MEMBER
  • 10 POSTS
Ok, I'll check that stuff when I get there later. All this just from sitting for a month or so, crazy
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Tuesday, July 28th, 2015 AT 6:37 AM

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