Birty Dastards Jeep Club
Tech Forum => Workshop => Topic started by: YT on October 26, 2012, 01:34:22 PM
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Consulting the orrical. :)
Past couple of mornings, jeep starts fine, but just before norm temp a feckin awful misfire kicks in at tickover. Bad enough to cut the engine and make it difficult to restart. It'll restart after about a minute and misfire will dissapear, but is running hot enough to cut the fans in.
Any thoughts oh wise folk of Birtys ?
Cheers. :) :)
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Changed dizzy cap & rotor arm today, took it for a run, misfire, and fans cut in. Checked water level again and headed home. No sign of any issue at all. Smooth as silk tickover, strong acceleration and temp bang on 100c. What would be the likely hood of a dodgy temp sensor causing fuelling probs coming off choke first thing ?
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breakdown in the coil or ht wires?
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Think we have it Sussed. Will know better today after I take it for a quick run. Fairly certain it's been fuelling due to false readings from temp sensor.
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This might help regards temp sensors.
(https://birtydastards.com/frm/proxy.php?request=http%3A%2F%2Ffarm5.staticflickr.com%2F4017%2F4390712792_4a2867313d.jpg&hash=27a61d9f07d5a025366400941b3926c0b5022ca0)
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Recon the sensor was sending false readings to ecu, and fuel mixture was WAY rich as choke was comming off, due to low coolant level. Rad looked full, but header tank swallowed close to 6 feckin litres of water !
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sounds like you had an air lock :017:
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Would seem so. Just confirmed the above. Went out today, no misfire or overheating. Job done. On the upside the dizzy cap and arm needed changing anyway. :)
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Oh feck ! It's back again. Low coolant level. 3.5ltrs of water to top it up. No creamy oil, no obvious signs of leaks.
Should it be using that amount of coolant in 2 weeks of just town/ stop start driving?
Planning to flush and drain system and sling a bottle of K seal in at the weekend.
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does it continue to use water or just 3-4 litres cos I would be inclined to think you have a weep on the rad somewhere.
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Think you probably know the answer already but; no it shouldn't be using that much coolant.
Regardless if whether you can see anything; you've got a leak somewhere or you've filled it up last time with the heater turned off. :D
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does it continue to use water or just 3-4 litres cos I would be inclined to think you have a weep on the rad somewhere.
It took 6ltrs two weeks ago. So I would say it'll keep loosing water. Hopin the K seal will sort it, or anyone recommend anything similar.
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personally i would drop the rad out and atake a look at it and look for any tell tale signs of leakage then replace if it is, K seal and that kind of thing is something you use as a final resort before trading it in ! lol
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That would be ideal, but can't have the truck off the road (disabled), and cash is a bit tight just now.
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it could be down to something as simple as the hoses allowing the water past as well, do you still have the original expand to release clips? or jubilee type?
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It might be worth having a look at the water pump, take jeep for a run so engine is warm & when you get back check to see if water is coming out as engine cools, may only be a trckle but it can add up. Also check around core plugs I had a hair line crack near one, was hard to find as water evaporates as soon as engine is warm, radweld fix it though
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it could be down to something as simple as the hoses allowing the water past as well, do you still have the original expand to release clips? or jubilee type?
Yeah, still got those. A mate is gonna have a look at the weekend to see if there's any signs of weeping from the system.
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Mine had drips of water on the drive after a run, and dried water marks on the front of the engine looking from underneath , found a small rad leak , replaced rad............. :icon_winkle:
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the rads can leek on the ends were the plastic tanks fit to the metal rad
they leek when hot
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What sorta cost is envolved in a rad.
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I paid £120 for a re core exchange, but thats for the 2.5 engine , the guy said they were not as common as the 4 liter rad, try the breakers first thats assuming you need one , look for signs of leaks first........good luck :icon_winkle:
http://www.ebay.co.uk/itm/JEEP-CHEROKEE-4-0-LITRE-RADIATOR-BRAND-NEW-/290647381136?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3AJeep%7CModel%3ACherokee&hash=item43abef1490 (http://www.ebay.co.uk/itm/JEEP-CHEROKEE-4-0-LITRE-RADIATOR-BRAND-NEW-/290647381136?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3AJeep%7CModel%3ACherokee&hash=item43abef1490)
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if you want to keep the jeep find a local rad place a see if they can build you a brass and copper one
will cost more but can be fixed with a bit of solder
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Rad could be suspect. There is a strong smell of hot water when I stop.
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I paid £120 for a re core exchange, but thats for the 2.5 engine , the guy said they were not as common as the 4 liter rad, try the breakers first thats assuming you need one , look for signs of leaks first........good luck :icon_winkle:
http://www.ebay.co.uk/itm/JEEP-CHEROKEE-4-0-LITRE-RADIATOR-BRAND-NEW-/290647381136?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3AJeep%7CModel%3ACherokee&hash=item43abef1490 (http://www.ebay.co.uk/itm/JEEP-CHEROKEE-4-0-LITRE-RADIATOR-BRAND-NEW-/290647381136?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3AJeep%7CModel%3ACherokee&hash=item43abef1490)
Mate's coming over tomorrow to have a good check.
Thank for the link, decent price too. :)
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i got a new rad from ebay a few months back for £79 but cant find the dude i bought it from now.its now cooling so well i may have to block a bit of rad in the winter! :icon_super:
scotty
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Once again, the wise ones of Birtys are on the money. Rad leaking from passenger side, and only when up to temp. When it started leaking today, it was pissing out. Switched of engine, have it a few mins then restarted, when it got back up to temp, nothing then when fans cut it it started leaking again but nowhere near as bad, but hitting the viscus fan.
How long did it take you to fit the new rad Scotty?
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probs a hour ish? did a few things while in there put a inline temp gauge and flushed it all out the filled 50/50 with anti freeze that all took 2hours so just rad is faster.its not hard just lots of bolts to undo and the hydraulic fitting for the oil cooler(never did work how to get that off with out bending it a lot?) works a treat now even in deep deep mud at picadilly woods.
scotty
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a trick I discovered to release the oil cooler lines was to use a small jubilee clip and push it on then tighten and it releases the fitting
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Ordered the rad today (from the eBay link) phoned him direct tho and got it for £95 inc next day deliv. :) anyone any idea how much antifreeze is recommended for the system, and is it worth while using bought coolant, or just straight water/antifreeze ?
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I use glycol based anti freeze, keeps cool in summer, 50/50 ...........
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That's the mix I use..no probs from minus 25c to plus 43c over the last three years.
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The makers of glycol recommend using de-ionised water, I always mix 50:50 with de-ionised. You can get it in half gallon cans for a £1 something from Asda, when it's this cheap why put all the chalk and crap from tap water in your rad.
I learnt a while back that different brands may have different additives and shouldn't be mixed even though there are only two basic types of glycol, it has little to do with how much protection they give or what colour they are, rather that one type is poisonous and the the other is very poisonous. From that I'd suggest buying one brand only, put the glycol in the Jeep and stick to drinking beer and whiskey.
One other thing, don't mix red and green together, it makes a nasty rusty brown colour, probably not harmful but it certainly doesn't look good. I know - I've done it!
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I replaced my rad last feb and after flushing the system with the old rad in place I removed the block drain plug and then refilled with G-05 coolant and de-ionised water. And why do we call it a 50:50 mix ratio and not 1:1?
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Different strokes for different folks Jonny.. :icon_winkle:
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Cheers guys. Got the new rad fitted today. The mate who done it refined he had more hassle changing a rad in an Astra he had, the quick release oil line just popped off by hand. :) the old rad was totally fubar'd, but can't complain as it lasted 17 years. All seemed spot on. Chucked a bottle of Kseal in when we filled the system as a belt & braces.
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Welldone, now sit back and relax................. :greggmo: