Topic: wrangler jeep heavey on juice any ideas (Read 10190 times)

72 watch · « **on:** January 12, 2011, 08:41:56 AM »

hi birtys me again brought a wrangler jeep 1993 2.5petrol. its had a engine rebuild and been serviced filters plugs ect. drove it back from sailsbury on half of tank and drove round a couple of days seemed ok on the fuel. put £20,00 in and done 30miles. just drank the fuel. this was driving at 1500 revs around town so was not heavey footed. ive taken a plug out and its a nice light brown colour. as i was thinking lamba sensor but not to sure if its that.. but the problem i have is when its hot the engine throws over abit b4 it will start and when it does start its just like its flood as the smell of petrol is strong, soon clears it self when fires up. only thing i did check is that the tyres had about 24psi in and when i checked the net they should have 34psi. so ive only just corrected that but cant see that making abig diffrence. any suggestions plz

Tank · « **Reply #1 on:** January 12, 2011, 03:47:41 PM »

Although now £20 only buys a shade over 3 gallon its still bad,my 6.6 litre averaged more than that.Bubbas the man for the older Jeeps,im sure he will be along later with some wisdom

Bubba · « **Reply #2 on:** January 12, 2011, 04:07:51 PM »

first off make sure you record ya mileage and fuel best is to fill er up and do a hundred miles then you will have a much better idea

but please note the 2.5 is not really any more economic than the 4.0 and as we all know tatting about is a killer to mpg whilst it sounds i bit steep check first before you start spending cash

Panic mechanic! · « **Reply #3 on:** January 12, 2011, 04:21:10 PM »

i think there is only about 2mpg difference officially wasn't it? altho slightly more on a run (@6mpg more)

Bubba · « **Reply #4 on:** January 12, 2011, 04:42:24 PM »

no idea what the stats were but out in the real world there wernt a lot in it

tim_aka_tim · « **Reply #5 on:** January 12, 2011, 04:57:42 PM »

1993 Jeep Wrongler 2.5 City 16mpg Hwy 19mpg Combined 17mpg
1993 Jeep Wrongler 4.0 City 15mpg Hwy 18mpg Combined 16mpg

(US Gallons)

Pretty close - why bother with the 2.5, given that it has more issues than the 4.0.
Anyway, 16mpg US is 19mpg Imperial for city driving, and twice what the OP is getting.

72 watch · « **Reply #6 on:** January 12, 2011, 05:55:24 PM »

to be honest i dont mind 16mpg but 8/10 mpg a killer. especially at the rate fuel is. i have posted something else on diesel conversions for thease under mods. in what diesel engine will best fit with very little modifications. any suggestions anybodie.thanx for all your replys

Bubba · « **Reply #7 on:** January 12, 2011, 05:56:59 PM »

none easy

Panic mechanic! · « **Reply #8 on:** January 12, 2011, 06:00:10 PM »

what wheels are you running?

Bubba · « **Reply #9 on:** January 12, 2011, 06:03:50 PM »

good point panic is it still standard

how old is the engine rebuild could it still be a bit tight and still running in ? also i wonder why it needed a rebuild a solid engine much like the 4.0 normaly

tim_aka_tim · « **Reply #10 on:** January 12, 2011, 06:08:32 PM »

Mike posted an issue seen on 2.5 petrol engines, but I can't remember what it is. Doesn't affect the
4.0.

Bubba · « **Reply #11 on:** January 12, 2011, 06:09:46 PM »

missing two cylinders

Panic mechanic! · « **Reply #12 on:** January 12, 2011, 06:15:14 PM »

Quote from: V8 Bubba on January 12, 2011, 06:09:46 PM

missing two cylinders

dumbass...... its missing 4

72 watch · « **Reply #13 on:** January 12, 2011, 06:21:38 PM »

hi im running 31.50/15 and the engine is origianal at 130000 miles . the motor no modifications never bin off rd. but when the engine is warm it dont start straight away it has to throw over a bit then when it fires up its just like its flooded as strong smell of petrol but soon clears.

tim_aka_tim · « **Reply #14 on:** January 12, 2011, 06:23:18 PM »

Quote from: V8 Bubba on January 12, 2011, 06:09:46 PM

missing two cylinders

It is funny to see the fan cowling on a 2.5 Wrangler is nearly as big as the engine

Panic mechanic! · « **Reply #15 on:** January 12, 2011, 06:41:52 PM »

I would think it could be something along the line of either lambda sensor, or tps, or altho you said its been rebuilt what work was done with the injectors? could it be worth running some redex thru it to clean up the fuel system?

tim_aka_tim · « **Reply #16 on:** January 12, 2011, 06:47:23 PM »

Or maybe maf sensor?

Bubba · « **Reply #17 on:** January 12, 2011, 07:13:15 PM »

make sure you know sactly how thirsty first the 31s will drag it down a bit

Panic mechanic! · « **Reply #18 on:** January 12, 2011, 07:28:10 PM »

the yellow yj I had , was fitted with 31' at's and did a lot better than that.altho it was gutless and would run the opposite way from a hill, unless you were off roading and it went everywhere it could on the tyres it had.

72 watch · « **Reply #19 on:** January 12, 2011, 08:12:16 PM »

im not sure what work its had done. but yes i will try redx as i dont think the injectors have been changed. also whats the tps.

tim_aka_tim · « **Reply #20 on:** January 12, 2011, 08:34:24 PM »

Don't bother with that shit. Put 100ml of pure acetone in the tank and fill up. It really works.

Jonny Jeep · « **Reply #21 on:** January 12, 2011, 10:19:59 PM »

A bad upstream O2 sensor can cause excessive fuel use. So can bad or disconnected engine temp sensors which will fool the computer into thinking it's -40 degrees and massively enrich the fuel mix. I think a 93 has two temp sensors but not sure which would be used for fuelling calculations. A bad O2 sensor shouldn't cause issues till the sensor warms up as they are not used during initial warm up.

Mike Pavelin · « **Reply #22 on:** January 12, 2011, 10:42:31 PM »

Get rid and buy a 4.0. Happy days

Bubba · « **Reply #23 on:** January 12, 2011, 10:45:01 PM »

thats a bit harsh but has merit

72 watch · « **Reply #24 on:** January 12, 2011, 11:03:32 PM »

to behonest i was going to buy a 4.0l but this came up and to be truthful its so quick and it rips up hills like stink.it really is quick it surprised me how it dont hang ar.ound.

Author Topic: wrangler jeep heavey on juice any ideas (Read 10190 times)

72 watch

Tank

Panic mechanic!

72 watch

Panic mechanic!

Panic mechanic!

72 watch

Panic mechanic!

Panic mechanic!

72 watch

Mike Pavelin

72 watch