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1993 Ford Explorer Sputter


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Jmilljag
Novice

May 25, 2017, 6:42 AM

Post #1 of 17 (403 views)
1993 Ford Explorer Sputter Sign In

1993 Ford Explorer starts, idles, and runs great. MPG is normal, but occasionally the check engine will come on for a short period and car will run rough/sputter and die if your at a slow speed. Then problem corrects itself after 5-10 seconds or upon restart then it drives great until the next episode. Check engine light goes off after that 5-10 seconds. It will probably happen 1-2 times over a 25 mile drive. Any initial thoughts before I dig into this?


Tom Greenleaf
Ultimate Carjunky / Moderator
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May 25, 2017, 7:18 AM

Post #2 of 17 (395 views)
Re: 1993 Ford Explorer Sputter Sign In

OK - it's intermittent and should have a code to get. Do you have access to a code reader for this or can you get codes read and post the #s please we can suggest from what it sees. Know it isn't to tell you what to replace or do just which circuit sees a fault,


T



Jmilljag
Novice

May 30, 2017, 1:39 PM

Post #3 of 17 (357 views)
Re: 1993 Ford Explorer Sputter Sign In

Codes while off were 181, 189, 215, 228, 539

Codes while running, take in mind that maf sensor had to be unplugged now to run test otherwise car stalls are 90, 157, 998

Car now won't idle unless maf is unplugged or you pump the gas pedal

Now has a new maf and a new fuel filter


Hammer Time
Ultimate Carjunky / Moderator
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May 30, 2017, 2:39 PM

Post #4 of 17 (345 views)
Re: 1993 Ford Explorer Sputter Sign In

I don't see the engine size anywhere.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jmilljag
Novice

May 30, 2017, 2:41 PM

Post #5 of 17 (341 views)
Re: 1993 Ford Explorer Sputter Sign In

4.0 v6


Hammer Time
Ultimate Carjunky / Moderator
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May 30, 2017, 2:51 PM

Post #6 of 17 (339 views)
Re: 1993 Ford Explorer Sputter Sign In

181-Fuel system too rich Bank 1

189-Fuel system too rich Band 2

215 -PCM detect primary coil 1 circuit failure

228-Not valid for this vehicle

539-AC on defrost during KOEO

I would attack the 215 first and find out what the problem is with that coil.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jmilljag
Novice

May 30, 2017, 8:18 PM

Post #7 of 17 (323 views)
Re: 1993 Ford Explorer Sputter Sign In

Thanks. Tested all the plug wires and all were firing.
Took it down the road, after it still was sluggish, but would idle with the maf plugged in reran the codes twice and got
412, 538, and 137 both times
Did have to pump the gas once or twice during the test to keep it from stalling
O2 sensor?


Hammer Time
Ultimate Carjunky / Moderator
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May 30, 2017, 8:23 PM

Post #8 of 17 (321 views)
Re: 1993 Ford Explorer Sputter Sign In

412-Cannot control RPM during KOER high RPM test.

538-Invaled cylinder balance test due to throttle movement

137-Rich Bank 2


The first 2 code just mean you didn't do the test right.

As I said earlier, find the coil problem and stop unplugging the sensors.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Jmilljag
Novice

May 30, 2017, 9:27 PM

Post #9 of 17 (317 views)
Re: 1993 Ford Explorer Sputter Sign In

Sensors we're not unplugged during test. Only thing that was done was car was given a bit of gas on 2 occasions once car was about stall during test. Would that cause test to be done incorrectly? All other directions were followed when prompted.
As far as find the coil problem, I tested for spark at each plug wire and got it. What other issues am I looking for with the coil?

Thanks again for your help


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

May 31, 2017, 5:19 AM

Post #10 of 17 (303 views)
Re: 1993 Ford Explorer Sputter Sign In

You have an intermittent misfire and a code for the primary circuit on Coil one so, yes you have a spark problem that is related to the triggering of that coil. That could be caused by the coil itself or the related wiring and needs to be resolved before looking for any other issues and yes touching the throttle during the KOER test will disrupt the test.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Loren Champlain Sr
Veteran / Moderator
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May 31, 2017, 3:12 PM

Post #11 of 17 (287 views)
Re: 1993 Ford Explorer Sputter Sign In

Since there was a MAF code, and being a Ford, and that it runs better with the MAF disconnected, I'd attack that first.
It's easy to remove and clean. Afterwards, clear the codes, then re-test drive. If the MAF code comes back, you'll probably have to replace it. JMHO.
Loren
SW Washington


Hammer Time
Ultimate Carjunky / Moderator
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May 31, 2017, 3:34 PM

Post #12 of 17 (285 views)
Re: 1993 Ford Explorer Sputter Sign In

I know he said he unplugged it but I didn't see a MAF code listed.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 1, 2017, 12:42 AM

Post #13 of 17 (276 views)
Re: 1993 Ford Explorer Sputter Sign In

IDK - I have the real code reader for this and it wrong so much or erratic even when this wasn't that old I dare say the open plug connector can't be trusted for codes well but now every vacuum hose in this thing is suspect or toss them all without breaking connectors!


T



Jmilljag
Novice

Jun 1, 2017, 10:15 AM

Post #14 of 17 (260 views)
Re: 1993 Ford Explorer Sputter Sign In

Well, found another vacuum leak, changed out plugs/wires/ignition coil. Car idles good and has good power. Only code that was given was 539 and that 538. This time throttle wasn't touched and directions on scanner were followed.

Went to inspection place this morning and then check engine flashed. Now getting 539 and 177 when off and 538 and 137. Idle and power are good. AC and Defrost have been off for every test. Erratic rpm movement is gone, idle is smooth. Any ideas of where to look now?


Jmilljag
Novice

Jun 1, 2017, 10:59 AM

Post #15 of 17 (256 views)
Re: 1993 Ford Explorer Sputter Sign In

Well, went through emissions and it passed without any problems. Check engine light came on, but they said it didn't matter because car was too old. Still want to stop code from coming on.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 1, 2017, 11:05 AM

Post #16 of 17 (254 views)
Re: 1993 Ford Explorer Sputter Sign In

You still have an unstable idle and rich mixture on bank 2 so you might lokk for things like a leaky injector.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Jun 1, 2017, 11:13 AM

Post #17 of 17 (248 views)
Re: 1993 Ford Explorer Sputter Sign In

You may still have a vacuum leak and again I don't trust codes for this scanner for it or not. Try carb spray at intake and throttle body gaskets too if that changes idle it shouldn't. Smoke tests can be better or windy from fan?


Other is with what may now be fixed it's just not blown out yet so a good ride and a few hard accelerations from a stop idea is get O2 sensors, cat and engine to work hard might clear out prior yuk and make converter hotter to clear itself.
You are getting the erratic readings I fear so blow it out is what I suggest then see what stays if anything,


T







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