Oil in Gas tank -- erratic idle

Man it's not a good new year for me, I accidentally picked the wrong
funnel (dumbass) to pour gas into my tank and used an oiled one. My 90
4.0L 6 cyl. XJ now has an alarmingly erratic idle spiking from @100 rpm
to 3-400 rpm every complete turn... aaargh, any suggestions, new plugs?
HELP!

A little oil in the tank's not going to hurt a thing.
I would look at the connections and/or clean the Throttle Position
Sensor, or beside it the idle step motor, responsible for the engine RPM
speed dictated via the computer:
http://members.cox.net/wilsond/tb/tb.html
God Bless America, Bill O|||||||O
http://www.billhughes.com/

Stevil wrote:
>
> Man it's not a good new year for me, I accidentally picked the wrong
> funnel (dumbass) to pour gas into my tank and used an oiled one. My 90
> 4.0L 6 cyl. XJ now has an alarmingly erratic idle spiking from @100 rpm
> to 3-400 rpm every complete turn... aaargh, any suggestions, new plugs?
> HELP!

Also, run a bottle og BG44K it is the best stuff on the market do a search
for a supplier in your area.
Coasty


"L.W. ("ßill") Hughes III" > wrote in message
...
> A little oil in the tank's not going to hurt a thing.
> I would look at the connections and/or clean the Throttle Position
> Sensor, or beside it the idle step motor, responsible for the engine RPM
> speed dictated via the computer:
> http://members.cox.net/wilsond/tb/tb.html
> God Bless America, Bill O|||||||O
> http://www.billhughes.com/
>
> Stevil wrote:
>>
>> Man it's not a good new year for me, I accidentally picked the wrong
>> funnel (dumbass) to pour gas into my tank and used an oiled one. My 90
>> 4.0L 6 cyl. XJ now has an alarmingly erratic idle spiking from @100 rpm
>> to 3-400 rpm every complete turn... aaargh, any suggestions, new plugs?
>> HELP!

I suspect it it more WHAT you put in the tank and not the funnel used to put
it in with.
Did you put in 2-stroke fuel by mistake? I have seen that before and
usually there is more smoke out of the tailpipe.
--
later,
dave AKA vwdoc1

"Coasty" <uscg_ret at comcast dot net> wrote in message
...
> Also, run a bottle og BG44K it is the best stuff on the market do a search
> for a supplier in your area.
> Coasty
>
>
> "L.W. ("ßill") Hughes III" > wrote in message
> ...
> > A little oil in the tank's not going to hurt a thing.
> > I would look at the connections and/or clean the Throttle Position
> > Sensor, or beside it the idle step motor, responsible for the engine RPM
> > speed dictated via the computer:
> > http://members.cox.net/wilsond/tb/tb.html
> > God Bless America, Bill O|||||||O
> > http://www.billhughes.com/
> >
> > Stevil wrote:
> >>
> >> Man it's not a good new year for me, I accidentally picked the wrong
> >> funnel (dumbass) to pour gas into my tank and used an oiled one. My 90
> >> 4.0L 6 cyl. XJ now has an alarmingly erratic idle spiking from @100 rpm
> >> to 3-400 rpm every complete turn... aaargh, any suggestions, new plugs?
> >> HELP!
>
>

I would be thinking maybe it wasn't 'gas' you put in the tank.... The
idle sure isn't related to a little oil on a funnel...

The TPS's computer plug and socket get dirty on those. I use a spray
contact cleaner on them, but WD40 will work in a pinch.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Stevil wrote:
>
> Man it's not a good new year for me, I accidentally picked the wrong
> funnel (dumbass) to pour gas into my tank and used an oiled one. My 90
> 4.0L 6 cyl. XJ now has an alarmingly erratic idle spiking from @100 rpm
> to 3-400 rpm every complete turn... aaargh, any suggestions, new plugs?
> HELP!

Thanks fellas, I took to removing the TPS to clean it and discovered
the top torx screw was shawn in two and the bottom one was loose. On
removal and inspection it was clean, I gave it a clean anyway and the
underside of the throttle arm too; I have re-attached it with just the
lower screw as I've been unable to find a replacement! I've tried Jeep
-- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with
no joy... other than going to a wreckers ANY thoughts? It seems to be
neither a 4 or 5 metric but somewhere in-between.

Then I discoverd the MAP sensor vacum tube was broken in half! I guess
it was brittle and snapped when I was checking the tightness of the
manifold, so I replaced that and she seems to be running okay... not
perfect but I also discovered the drivebelt needs replacing as does the
water pump drivebelt wheel because it has a major crack in it... oh
brother! Looks like a real BUST weekend.

It's call normal maintenance. Something that used to be caught
every two months at your corner service station, lubrication.
God Bless America, Bill O|||||||O
http://www.billhughes.com/

Stevil wrote:
>
> Thanks fellas, I took to removing the TPS to clean it and discovered
> the top torx screw was shawn in two and the bottom one was loose. On
> removal and inspection it was clean, I gave it a clean anyway and the
> underside of the throttle arm too; I have re-attached it with just the
> lower screw as I've been unable to find a replacement! I've tried Jeep
> -- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with
> no joy... other than going to a wreckers ANY thoughts? It seems to be
> neither a 4 or 5 metric but somewhere in-between.
>
> Then I discoverd the MAP sensor vacum tube was broken in half! I guess
> it was brittle and snapped when I was checking the tightness of the
> manifold, so I replaced that and she seems to be running okay... not
> perfect but I also discovered the drivebelt needs replacing as does the
> water pump drivebelt wheel because it has a major crack in it... oh
> brother! Looks like a real BUST weekend.

Stevil did pass the time by typing:
> Thanks fellas, I took to removing the TPS to clean it and discovered
> the top torx screw was shawn in two and the bottom one was loose. On
> removal and inspection it was clean, I gave it a clean anyway and the
> underside of the throttle arm too; I have re-attached it with just the
> lower screw as I've been unable to find a replacement! I've tried Jeep
> -- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with
> no joy... other than going to a wreckers ANY thoughts? It seems to be
> neither a 4 or 5 metric but somewhere in-between.

I usually try the local ACE/Westlake hardware store.
Those are fairly common screws. If you lived in Oklahoma
I'd give you one. Remember to check the regular/Phillips/and hex key
bolts and possibly SAE since Jeep tends to mix threads.

> Then I discoverd the MAP sensor vacum tube was broken in half! I guess
> it was brittle and snapped when I was checking the tightness of the
> manifold, so I replaced that and she seems to be running okay... not
> perfect but I also discovered the drivebelt needs replacing as does the
> water pump drivebelt wheel because it has a major crack in it... oh
> brother! Looks like a real BUST weekend.

Better to ruin a weekend than an engine.

While your in there check all the plastic. I've had to replace
almost all the plastic plumbing on my engine.


--
-- DougW -- 93 ZJ 4.0 http://www.revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

The bolt is likely a 3/8".

I would recommend changing a lot of vacuum lines if one was brittle.
The front axle disconnect works by vacuum too I believe.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Stevil wrote:
>
> Thanks fellas, I took to removing the TPS to clean it and discovered
> the top torx screw was shawn in two and the bottom one was loose. On
> removal and inspection it was clean, I gave it a clean anyway and the
> underside of the throttle arm too; I have re-attached it with just the
> lower screw as I've been unable to find a replacement! I've tried Jeep
> -- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with
> no joy... other than going to a wreckers ANY thoughts? It seems to be
> neither a 4 or 5 metric but somewhere in-between.
>
> Then I discoverd the MAP sensor vacum tube was broken in half! I guess
> it was brittle and snapped when I was checking the tightness of the
> manifold, so I replaced that and she seems to be running okay... not
> perfect but I also discovered the drivebelt needs replacing as does the
> water pump drivebelt wheel because it has a major crack in it... oh
> brother! Looks like a real BUST weekend.

Oops, I meant 3/16" for the bolt....

Mike

Mike Romain wrote:
>
> The bolt is likely a 3/8".
>
> I would recommend changing a lot of vacuum lines if one was brittle.
> The front axle disconnect works by vacuum too I believe.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> Stevil wrote:
> >
> > Thanks fellas, I took to removing the TPS to clean it and discovered
> > the top torx screw was shawn in two and the bottom one was loose. On
> > removal and inspection it was clean, I gave it a clean anyway and the
> > underside of the throttle arm too; I have re-attached it with just the
> > lower screw as I've been unable to find a replacement! I've tried Jeep
> > -- they want $120 for a new TPS -- Ace hardware, Kragen and Napa with
> > no joy... other than going to a wreckers ANY thoughts? It seems to be
> > neither a 4 or 5 metric but somewhere in-between.
> >
> > Then I discoverd the MAP sensor vacum tube was broken in half! I guess
> > it was brittle and snapped when I was checking the tightness of the
> > manifold, so I replaced that and she seems to be running okay... not
> > perfect but I also discovered the drivebelt needs replacing as does the
> > water pump drivebelt wheel because it has a major crack in it... oh
> > brother! Looks like a real BUST weekend.