poor performance (stock n/t)

[JaaMotors]

Ok to start out I baught this car not to long ago. It is a 91 talon 2.0 m/t stock. I got it for 500 and the kid thaught it was a fuel problem and changed pump and filter, battery,alternator, so he says but in the order he changed the battery and alt. He messed up the battery. so when i got the car i put in a new one and made the car run perfect lots of pull, Ive waited for almost ten years for a dsm by the way. sorry off topic. now the car runs like crap. I thaught the timing jumped. it must not of. the cel came on so i got a volt tester and checked the codes to the book. It was the tps and the 02 sensor. I adjusted the tps and got rid of that code. The o2 keeps coming back. I followed the book and the vfaq the best I could to do the timing and I say the best because the marks with a strait endge acrost the four marks and they dont line up. Im trying to give back ground so ill get to the questions. ive tested the coils, primary and secondary. the secondarys fall in the range of the book but the primary doesnt. It measures at 1.1 ohms so I checked about ten at the junk yard and they all tested the same or close to. the book says it should be 0.70-0.86 ohms. I dont know if the tester is off or the book is off. Can any one confirm this. The other question is will the ics make the hole power band act stupid. before the problems what every one called idle surge i think it did. It was winter i got this so it revved to 2 grand and then would drop for a quick second and go back up and do it again until it was warmed up. i also cut the cat out cause the shell of it was rusted out. so it is exaust leaking i havnt seen this problem make this much problem but is it also possible. THANK YOU TO ANY ONE THAT IS WILLING TO HELP IN ADVANCE.

 

[synthetek]

If your getting a cel for the o2 sensor than the first thing you should do is probably test it and replace it if its not working properly.

 

[JaaMotors]

first off nice car it looks real clean. ok as far as the o2 sensor ill check it but what if its ok any other ideas? I just remembered that i have to have the cas clocked almost all the way to the clockwise position to run half way. This is my DD but I only dive it mile to work and the same home.

Ok I just was under the hood and seen that the wires that are on the back of the coils are bare and corroded. Iknow this has to be replaced but could this be the problems with my car. I also forgot to mention that every once in awhile that it will start to act like its fuel cutting and I will have to shut the car off and restart it. Also just to mention Ive looked in the ecu and no leakage from the caps. surprising thou considering the car has 205K on the clock. .

 

[JaaMotors]

Does any one know the answers about the coil packs or the ics questions. PLEASE.

 

[asb2106]

Im thinking I would start with the o2 sensor.

It can cause serious problems with your car.

The timing issue, keep trying, you will get it. It took me about 4 times before I got it down.

I went through a ton of things on my talon (head, twice, intercooler/piping, turbo, fuel pump) before going back over the little simple ones, ended up being a knock sensor not throwing a code and just retarding my maps a ton under boost causing it to just cut fuel.

The little sensors are very important to operation, replace that o2 and then move on to the next step.

 

[EuroDriver]

Which coil?.. I'm looking it up in service manual for your car

Found them
Screen shot taken.. Good luck!

 

[JaaMotors]

Ok I know its been alittle bit. Here's what I've got soo far. I've replaced the coil packs and tested the o2 sensor and it all checks out good. I did find out the timing was off so I re did it again. It is right this time for sure checked four times before trying to even start it. I checked the ignition module with the 1.5v battery like the book said and its getting a consistant half volt for both sides. I'm really getting lost. Please help bad.

 

[bluegs03]

do you have the 1.8l or the 2.0l because those readings would be perfectly normal for the 1.8l

 

[JaaMotors]

Its the 2.0. i went down to oriellys to have them test the module but there machine is out being rebuilt. the book only says to look for continuity and doesnt give any reference numbers to go off of. Ive looked for it on the net to no prevail. Im starting to get real desperate.