Started bucking hard?
like it would not go into the lower gear for some reason or another. I would have to assume that the transmission is in sync with the engine via the computer module.
miss fire on plug one. Well you could buy one fuel injector and swap that out for number 1 and see if it makes a difference. I don't know if it would be like coil packs(where you buy one and replace the one that is misfiring and take the one that was there and swap it for cylinder 2. When the end result hoping to be that it wakes up the coil that was unresponsive in cylinder number 1) where just one activates the others that were having problems before. That is a truth. And is why most people that I have talked to advise to only buy one coil pack at a time.
Even cheaper you could buy a fuel injector o ring and seals kit or a hardware installation kit; not having to replace any injectors and re sealing the injectors to the head. With that I would advise what they call "O-ring silicon grease" not sealant! and use that with the seals in the kit. This product is specifically designed for this application of installing fuel injectors. Just don't use it on the Teflon seals which I don't think you have due to the lower compression of your naturally aspirated engine. Just on the rubber seals.
Wow you checked alot of stuff there. What happens sometimes with a crankcase breather tube which I am assuming is coming off of your valve cover; is the part where the breather hose attaches to a plastic neck of the valve cover end breaks and would cause a rough start and rough time. Rough start and rough running are some key traits to the mini engine I know that much when it comes to problems they are specific and the same things that can occur. like the plastic neck that the breather tube goes into cracks on the underside so you would need to remove the valve cover and inspect the underside of the plastic neck on the valve cover.
Rough Start rough running also applies to the vanos solenoids which you have replaced. quality not really being important but I like ECS tuning Vanos solenoids for my mini due to the fact they hand assemble them in there shop and are quite a bit cheaper. Another things is to check your vacuum hose underneath the intake manifold and make sure they are connected. buy the small zip ties they sell at your local hardware store. And zip tie those little rubber vacuum hose. Check for engine vacuum and compression. But those little hoses can come off and the plastic reservoir does fail on some minis and would cause a dying idle situation.
Cleaning up the throttle body does not always work that is just how it is when they are plastic. So you might have to purchase a new. Off hand you can check that the throttle body is working by getting someone to start the car for you while you look at the butterfly on the inlet of the throttle body and it should go through it's entire range of motion.
you have to take the inlet pipe off of course to see that!
Right now I really cannot think of anything else that may be problem in respect to what you said about not being able to change the chain. It may not be a chain issue anyway.
like it would not go into the lower gear for some reason or another. I would have to assume that the transmission is in sync with the engine via the computer module.
miss fire on plug one. Well you could buy one fuel injector and swap that out for number 1 and see if it makes a difference. I don't know if it would be like coil packs(where you buy one and replace the one that is misfiring and take the one that was there and swap it for cylinder 2. When the end result hoping to be that it wakes up the coil that was unresponsive in cylinder number 1) where just one activates the others that were having problems before. That is a truth. And is why most people that I have talked to advise to only buy one coil pack at a time.
Even cheaper you could buy a fuel injector o ring and seals kit or a hardware installation kit; not having to replace any injectors and re sealing the injectors to the head. With that I would advise what they call "O-ring silicon grease" not sealant! and use that with the seals in the kit. This product is specifically designed for this application of installing fuel injectors. Just don't use it on the Teflon seals which I don't think you have due to the lower compression of your naturally aspirated engine. Just on the rubber seals.
Wow you checked alot of stuff there. What happens sometimes with a crankcase breather tube which I am assuming is coming off of your valve cover; is the part where the breather hose attaches to a plastic neck of the valve cover end breaks and would cause a rough start and rough time. Rough start and rough running are some key traits to the mini engine I know that much when it comes to problems they are specific and the same things that can occur. like the plastic neck that the breather tube goes into cracks on the underside so you would need to remove the valve cover and inspect the underside of the plastic neck on the valve cover.
Rough Start rough running also applies to the vanos solenoids which you have replaced. quality not really being important but I like ECS tuning Vanos solenoids for my mini due to the fact they hand assemble them in there shop and are quite a bit cheaper. Another things is to check your vacuum hose underneath the intake manifold and make sure they are connected. buy the small zip ties they sell at your local hardware store. And zip tie those little rubber vacuum hose. Check for engine vacuum and compression. But those little hoses can come off and the plastic reservoir does fail on some minis and would cause a dying idle situation.
Cleaning up the throttle body does not always work that is just how it is when they are plastic. So you might have to purchase a new. Off hand you can check that the throttle body is working by getting someone to start the car for you while you look at the butterfly on the inlet of the throttle body and it should go through it's entire range of motion.
you have to take the inlet pipe off of course to see that!
Right now I really cannot think of anything else that may be problem in respect to what you said about not being able to change the chain. It may not be a chain issue anyway.
