Topic: Stuttering TJ (Read 13584 times)

gazjeep · « **on:** February 20, 2012, 02:10:54 PM »

Took the TJ out Saturday, started misfiring badly, pulled over, idled fine, revved it a bit to teach it some respect, then gradually built up revs, let it idle for a few mins then drove home without further issue.

Should add that it was upto temperature & it had done 15 miles previous without issue.

Thinking throttle position sensor & crank position senor could do with replacing as its 14 years old now.

Possible upstrems o2 sensor too.

Anybody got any favourable links for prices, gonna try dealer for prices too.

isle of man · « **Reply #1 on:** February 20, 2012, 02:39:52 PM »

Not sure what year the TJ is but this happened to me on my early TJ's was the cap and rotor - the Mafia has electikerty.

Panic mechanic! · « **Reply #2 on:** February 20, 2012, 03:20:02 PM »

throttle body needs polishing lol or the injectors are mer'd up

Bishops Finger · « **Reply #3 on:** February 20, 2012, 03:55:09 PM »

Suspect CPS your lordship

gazjeep · « **Reply #4 on:** February 20, 2012, 06:09:48 PM »

Quote from: isle of man on February 20, 2012, 02:39:52 PM

Not sure what year the TJ is but this happened to me on my early TJ's was the cap and rotor - the Mafia has electikerty.

Tis a 98 H

Indeed, memo to self, got a new set of leads, dizzy cap & rotor arm in the garage somewhere, about time I dug em out & fitted then as a 1st step, had them that long I forgot about them

MOCAJ · « **Reply #5 on:** February 20, 2012, 06:15:44 PM »

my blue truck has a misfire, so far changed upstream oxy but no different, do you get a load noise from the snorkie when its missing ?

gazjeep · « **Reply #6 on:** February 20, 2012, 06:22:15 PM »

It only did it for a few hundred yards before I pulled over, started coughing & missing like it was running out of fuel, was making the drive train clunk a bit as it died & then recovered. As soon as I eased off it smoothed out, then did it again as I applied the right foot.

Pulled over, put into nuetral, revved it a bit, idled fine, checked under the bonnet, blipped it a bit more, then slowly raised the revs to 2.5k all seemed ok. Drove 12 miles home no probs.

Thought about damp as I had had the jet wash out earlier but had driven 15 mile to old chaps before hand with no issues.

Will change the leads etc first, probably look to get CPS & TPS changed due to age more than anything.

Would like to get MOPAR bits, but depends on price, wide range when i had a quick look last night

MOCAJ · « **Reply #7 on:** February 20, 2012, 06:27:41 PM »

lighthouse were cheaper than dealers but crown parts

swap them leads and stuff first, damp maybe, but if you have a new set just chuck em on anyways mate

gazjeep · « **Reply #8 on:** February 20, 2012, 07:35:40 PM »

Yep

Dave69 · « **Reply #9 on:** February 20, 2012, 09:21:48 PM »

pop the dizzy cap and clean the contacts with fine emery cloth, another reason why not to jet wash an engine

gazjeep · « **Reply #10 on:** February 20, 2012, 10:20:32 PM »

Didnt jet wash the engine, just the arches & chasis but no doubt a bit could have got up the inside of the engine bay

Bishops Finger · « **Reply #11 on:** February 20, 2012, 10:57:31 PM »

Quote from: gazjeep on February 20, 2012, 10:20:32 PM

Didnt jet wash the engine, just the arches & chasis but no doubt a bit could have got up the inside of the engine bay

Slacking there sir....

MM · « **Reply #12 on:** March 05, 2012, 05:14:20 PM »

OK to the Wrangler decided to play up with the wrong person today!!!!

Pulled away from an island in drive, up hill so needed some acceleration, at first no power (scary) then stuttering and a loud knocking noise from underneath, almost like it was trying to find a gear. As I had a BMW up my arse I had to try to accelerate to give myself space to indicate to pull over with out the idiot shunting me from behind!

Pulled over and put it into neutral, went in to neutral no probs, let it run for a few mins, pumped the accelerator a few times and seemed to be OK. Put it into drive, again no probs with the actual gear change, and pulled away in drive and she was fine.

Got home and started to reverse down the drive. Our drive is on a downward slope so the foot brake is applied and not the accelerator. As I was reversing down the drive the jeep started to rev itself, short revs not one constant one. My foot was no where near the accelerator. Stopped in front of the garage door and put the jeep in to park and for a few seconds after, the jeep was still doing short sharp revs then fell back to a smooth rev due to being in neutral.

Your technical diagnosis is much appreciated Birties - please

Could it be the gear box, accelerator cable or something more sinister

Delk · « **Reply #13 on:** March 05, 2012, 06:49:20 PM »

My tj gave trouble with fuel pump once. It would run fine then studded and loose power at very inappropriate times! The pump would loose pressure once in awhile and never gave a code or any other sign. Only Way I found it was by putting a pressure gauge on the fuel manifold and driving around.

At the time I was commuting past Cambridge on Friday evenings and it wasn't a fun experience in traffic.

MOCAJ · « **Reply #14 on:** March 05, 2012, 07:07:24 PM »

if you do the ignition on off on off on trick do you get any codes ?

i also have a full code reder here if you can limp over to the ditch

gazjeep · « **Reply #15 on:** March 05, 2012, 08:41:03 PM »

Have been out & checked for error codes as per http://www.wranglerforum.com/f5/tj-error-codes-358.html

All stages gone thru for the sentry system as described but no error codes at all.

Steve, would your scanner pick up anything else ?

Got to be honest, havent changed the leads & dizzy cap yet as it was all a bit tight, didn't want to bugger anything up & TBH have been busy with family stuff over the weekend with more to come.

Seems like I will have to bite the bullet & get it in the garage one night this week.

Bloody MOT due too FFS

MOCAJ · « **Reply #16 on:** March 05, 2012, 08:46:51 PM »

bring it over one night in the week and i will plug it in or even better, im off tomoz so bring it in your dinner

gazjeep · « **Reply #17 on:** March 05, 2012, 08:54:13 PM »

Cheers Steve

Do you think I should have a go at the leads first ?

Work stupid busy at the mo, got major QA audits this week & next, will try & bring it over one night if thats ok ?

MOCAJ · « **Reply #18 on:** March 05, 2012, 08:59:16 PM »

drop it off here in the morning with your new leads and dizzy cap, i will drop you at work and pick you up later

i get up at 6

gazjeep · « **Reply #19 on:** March 05, 2012, 09:01:51 PM »

I'll give you a ring in a mo

Bishops Finger · « **Reply #20 on:** March 05, 2012, 10:05:55 PM »

It sounds like every problem my TJ has displayed....together...

scrw · « **Reply #21 on:** March 05, 2012, 10:13:02 PM »

did you swap out the TPS? Cleaned the ICV aswell?

gazjeep · « **Reply #22 on:** March 06, 2012, 07:09:16 PM »

Jeep drove home sweet as a nut, many thanks to MOCAJ

Now found a new problem, sodding radiator leaking

Radiator place round the corner from work has quoted £154 + VAT to re-core. Opinions please.

Panic mechanic! · « **Reply #23 on:** March 06, 2012, 07:26:14 PM »

not a bad price to be honest I was quoted over £200 for the wj one. The cheap ones you get off ebay fail quickly so I would not buy one of them.

MOCAJ · « **Reply #24 on:** March 06, 2012, 07:28:16 PM »

sounds reasonable price Gaz, is that to rebuild what you have with a new core ?

good to hear you had no moments on the way home, been researching that code that came up P0463 and the fix is new petrol cap as the seal is gone or fuel pump, obvs cap is cheapest and first to go for

i would run it for a week or so then re-scan to see if that ones gone

Author Topic: Stuttering TJ (Read 13584 times)

Panic mechanic!

Bishops Finger

Bishops Finger

MM

Delk

Bishops Finger

scrw

Panic mechanic!