Idles at 1000, NO loss of power, NO hesitation. ive tried a full tune up, it has a recently replaced throttle body and i even replaced motor mounts with no results. any ideas? im in a rural area and waiting on my code reader in the mail.
A high idle is common with a vacuum leak. Ive done plenty of chevy intake manifold gaskets due to the gasket failing.
SOURCE: 2005 chevy colorado runs rough and gets bad gas mileage.
Sounds like it needs spark plugs and wires, and a fuel system treatment.
SOURCE: changed 5.7 350 motor in 87 chevy k5 blazer with
If you are set on using this engine for its increased power and fuel efficiency, the only way you will realize these benefits is by changing the ECM/PCM from the engine donor vehicle to yours, put the 90 model engine's throttle body back on it, use the engine wire harness from the donor vehicle--in other words, the engine has to think it's still in the Caprice, and the only way to do this is to put the Caprice electronics and fuel management system (throttle body) back on it. If you have to modify the throttle linkage, the kick-down/TV cable, to make it work, then do it. Also, you will have to put an Oxygen sensor from a 90 Caprice into the manifold/collector/crossover pipe of your vehicle, and not one for the 87 truck. If it wont fit, plug the factory hole on your truck's Oxygen sensor location with a threaded plug using high-temp thread sealant, cut/weld in a proper-threaded orifice for the Oxygen sensor from a 90 Caprice. If the Caprice had two Oxygen sensors, you will have to put one on each cyclinder bank's exhaust outputs.
Swaps such as these are great if all the details are attended to, but headaches if you just try to throw and go.
If you do all this, the codes will not come back after you reset them, the engine will run great, you will have better power and greater fuel economy (the Caprice and the Blazer weigh within a couple hundred pounds of each other), and you will have a 1987 K5 Blazer which "thinks" it's a 1990 Caprice.
And remember when buying engine parts in the future to tell the counter guy "It's for my other car--the 1990 Caprice."
You get less **** out them that way.
SOURCE: Just replaced throttle body on 2006 Aveo. Engine
Hello angel 003801, if the car was running rough, and had acceleration issues before you changed the throddle body, I strongly recommend you get a new air filter. Many people are unaware that the air filter is like lungs to your engine, your engine needs a good mix of fuel and air to perform at it's peak. Also, most 10 minute oil change companies do not change the air filter, at best, some of them may take it out, hit it against something to clean some of the dirt out, and then put it back in.
If the engine seems to run better after putting in the throttle body I would still change the air filter if you haven't done that in a while. Also, make sure that the throttle body is mounted securely with no leaks, look around the area of the throttle body and make sure you didn't accidently knock of a vacuum hose, ( vacuum hoses are very small, usually black hoses, and there are several in the general area of the throttle body. If you should find a small hose that has one end that is not hooked to anything, look around for a small nipple that it may have come off of.
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SOURCE: Have 2003 chevy tahoe with
There is a Tecnical Service Bulletin (TSB) that specifically addresses codes P0120, P0220, and P1516.
It says that the TAC Module can set these codes erroneously under certain conditions. It is very likely that if your vehicle is diagnosed according to the provisions of this bulletin, the problem can be corrected without having to purchase or replace any parts.
It is Technical Service Bulletin number 03-06-04-032
Issued June 16, 2003
Please also review this article: What Else Could Be Wrong?
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