Question about 1993 Toyota Pickup

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1993 toyota 4-cylinder pickup 4x4

I have 199K miles on my truck. I tuned it up and put a timming chain, new value cover gasket, new plugs, distributor cap button, oil change. I also put in the gas tank several time injector cleaner.
The problem with motor is runs good but it ticks like maybe a value adjustment needs to be done but the main problem is like it is missing a lick while idling but you can't tell it by driving it. A mechanic just looked at the motor was idling and said it looks like it is running lean. It will almost stall out while idling. So far, no one has been able to tell what they think is wrong.

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  • fathead1974 Jul 02, 2008

    my truck was idling around 500 rpms and we diagnosed an upper intake gasket leak and that was repaired along with the plugs and wires. my mechanic took off the egr valve and noticed that is was completely stopped up with carbon and he cleaned it out and it still is idling rough and low and stalls when i do not have my foot on the accelerator. what could be the problem still?



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Try cleaning the mass air flow sensor they get dirty and the truck will loose power and could also idle rough after removing it and cleaning remove battery post then try it for power

Posted on Jul 25, 2008


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Put new timimg chain on 1984 toyota pickup,22R was running great all of the sudden it locked up,will turn about 1/4 turn each way ????? Any idea of the problem,this engine is difficult to find

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Could be a bad chain guide or tensioner.I've got a 85 Nissan 720 4x4 2.4 with a Weber carb.Had her since 1993.It had 108,000 miles on it when I got it.Not long afterwards,Carb went bad,no one could rebuild it,tried 3 places.Finally took to Nissan Dealer,they told me that the carb was a bad design and they could not rebuild,they told me it was junk,they were right,not long afterwards motor went bad,so I got a remanufactured Jasper motor,with 3 year-or 100,000 mile warranty,got it in 2009,I now have 61,000 miles on it with a new Weber carb and it runs awesome,never ever had a timing chain issue,speedo now has 344,000 miles on it.Had the engine installed by a Jasper engine installer,a pro,seems like whoever has been putting timing chains in your engine is clueless on these 2.4 engines,our Nissan's have a history of head gaskets blowing,never timing chain issues.Here is a link on how to replace your Timing chain. Repair Guides Engine Mechanical Timing Chain And Tensioner AutoZone com Here is a photo of mine,need more help,let me know.
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Is the plug really clean? That usually means the cylinder head gasket failed. You would need to remove the cylinder head. (valve cover, intake manifold, timing belt/chain) clean off the mating sufaces, inspect mating sufaces for truness, possibly have them machined, install new head gasket, bolt down head to correct tourque, reinstall timing belt/chain, intake manifold, (install all new gaskets) and valve cover. It's a lot harder than it sounds, usually. Call at least 4 local mechs for a quote to replace head gasket on your car. Just a gasket kit alone could cost 90 to 300 bucks depending on your model. This is a major job. Google head gasket and your model and year , you may fiind youtube videos for you exact model or similar.

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Click on the following free direct Link. It has the correct Serpentine and Drive Belt Diagrams for your 1993 Toyota Pickup, with either the 2.4L SOHC In-Line 4-Cylinder, 2.7L DOHC In-Line 4-Cylinder, or 3.0L SOHC V6 Engine with the different Engine Options (AC/No AC etc.).

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