22re missis in idle

[fast68]

my 87 misses in idle, almost like popcorn popping in it, but irregular, worse out of gear and idling, pooof pooof poof pop pop, all the time, in the exhaust and now and then the engine will completely miss a cylinder fire but only while in gear low RPM and when is hot temperature,


acceleration and highway speeds are fine no problems,

any ideas ? what to check, or clean or ? and wher eot find these things on it ?

could timing chain slop cause this ? it is noisy inside front of engine bad rattling noise alot like a 2.5L GM s-10 engine,



it is 87 FI 22RE with only 131k miles

thaanks

[87_SR5]

I would check for codes first....this may give you an indication something is up..

I had a similar problem, like it would idle fine but every once in a while i would get a miss. Got a code telling me it was just a miss, that no other sensor was at fault. Another thing you can do, which I did also, is check the plugs. After checking mine, 3 of them looked fine while the other had signs that it was missing.

After doing a tune up...the new spark plug wires cured the problem. That is what was wrong with mine, so it is a possibility for yours. Might be a clogged injector??? I don't know for sure, check the easy stuff first.



I don't think your timing chain is giving you the troubles, but I wouldn't let that chain rattle much longer. If the chain is rattling, it is most likely that the plastic timing chain guide broke and it is rattling against the timing chain cover. If you let this go too long, it will wear through and let antifreeze into your oil. Getting antifreeze in your oil, especially if you don't know about it, could ruin your crank bearings. Then you will end up spending more money in the end for a rebuild, instead of a new timing chain. I am glad I changed my chain when i did...it was worn through the timing cover halfway, if not more.

If you want to check for sure, remove your valve cover and look to see if the guide is gone. It will look something like this:

The upper part where it is wearing is the head, and the lower part is the actual cover. There should be a plastic guide there. This guide (always drivers side guide) breaks in most cases, causing the rattling. When doing a new timing chain, be sure to use a metal-backed guide. Most kits come with metal backed guides.


Hope this helps

[Sidney]

Most engine wear on any engine occurs at startup with that said the R series Toyota engines such as the 18R,20R and 22R all use a timing chain which it's tension is supplied by hydraulically driven timing chain tensioner which has it's oil pressure build up few seconds after the engine has started therefore the timing chain rubs on the driver's side brown colored nylon/plastic timing chain dampener or guide and after so many miles (140-170 000 miles in the city with the average 4 starts per day) the driver's side guide breaks through causing the chain to rub on the timing chain cover for the first few seconds upon startup and when driving in 5th gear and letting off the gas.
Usually by this point the other timing components such as the camshaft sprocket,crankshaft sprocket and chain have their specs out of tolerance and hence must be replaced as well.The tensioner sometimes sticks due to dirt build up and other problems arise as well and must be replaced as well,all of those parts are sold in the aftermarket world as a "timing chain kit" which also include gaskets and a front oil crankshaft seal.Toyota on the other hand for some reason does not sell the parts as a kit but as individual parts which would cost around $400+ and from all of the reading I have done on many Toyota 4-Runner/pickup discussion sites I have come to the conclusion that many experienced off-roaders who cannot afford to buy all of the genuine Toyota timing parts instead buy the chain and tensioner from Toyota and the other parts from aftermarket as a kit but of course don't use the aftermarket chain or tensioner.
The best brand of aftermarket timing chain parts to use on the 20R & 22R series Toyota motors are:

http://www.engnbldr.com/ToyotaHotlicks.htm
http://www.22r.biz/
http://www.rpmrons.com/toyotatiming.html
http://www.toyota-engine-parts.com/
http://www.europeanautomotive.com

and if you choose to buy from Toyota these places have the best prices in the USA & probably the whole world:

http://www.1sttoyotaparts.com/partscat.html (10% shipping)
http://www.toyotadiscountparts.com (free shipping with $100 & up)
http://www.Toyotaparts4U.com
http://www.toyotaofplano.com

Other ways to check timing chain wear are:

http://www.misterfixit.com/chanslop.htm

you can also remove the valve cover and take a flashlight and see if the driver's side timing chain dampener or guide wore through.

You can bend 1 to all 8 valves and have timing cover eaten through if you wait and then coolant and oil mix together to give you butterflies in your stomach.You can do a fluid analysis on your engine oil by going to any Caterpillar and buying a fluid analysis kit for around $15-20 and taking a sample of your old oil.

Finally these sites explain the timing chain replacement well:

http://yotarepair.com/22R%20timingchain.html
http://www.4crawler.com/4x4/CheapTri...ingChain.shtml
http://www.4x4wire.com/toyota/maintenance/timingchain/

Sidney® ™
Repairs tv's,vcr's,home/car audio out of my home
E-mail:sidneybek@yahoo.com
Dartmouth,Nova Scotia
Canada
1985 Toyota 4-Runner,solid front straight axle,factory cruise
control,sunroof,22R-E,W56,RN60LV-MSEK,rusted rear step/towing chrome
bumper with 244 000 KM