Failed Emissions Test

[RossT]

I thought something was strange back when he was wanting a MAP sensor. I new he had an earlier model. The part number he gave us for the MAP was a 95 or newer. I have one that matched his and I know it came from a newer metro.

Flash, you need to post your vin number. Your parts MAP, Idle motor etc are for a 95 or newer.

The parts and pics that we have been posting are for a 89-94 and maybee some very early 95's

There were alot of changes sometime during the 95 model year. They went from a obd1 to obd2 and many of the emission stuff (like idle motor) changed

Flash, find your TPS sensor it is on the left side of the TB (as your facing the engine) and count the number of wires that go into it. There are a couple of ways to adjust these things but we need to confirm the number of wires.

Also, look at your oxygen sensor on the exhaust manifold. How many wires go to it? 1 or more than 1?

This may explain alot of the confusion when we have been trying to help him.

Flash, it also looks like you figured out how to post pics. You may want to snap several pics of your engine compartment and post them for us.

91caprice, I am unsure about the PWM thing. Curious though.

[RossT]

Flash, on more thing for you to do. After you post your vin# if it comes up as a 94, I want you to post your eninge number, you can find it here:



clean the area and write down an post the numbers. There will be 10 digits, we really only need to know the 4th, it will be a letter. That 4th digit (letter) tells us what year the engine was made.

[flashlight]

For the time being my dad and I got the idle under control. We turned the factory service screw all the way out so that the engine would idle at about 1000 rpms. This is the one with the black cap that you're not supposed to remove but we did, as we failed to find the idle speed screw. Which of course still has to be a little higher than normal. We do think that the timing may be one tooth off one way or another, but that will be a job here in the next couple of weeks.

Unfortunately at the moment I won't be able to put the Vin# in this post because I'm away from my car. I will put all the information that I may have left out when I get back to town, but for the moment this is the best that I can give you.

Thanks to all who have helped me in diagnosing my car problems.