I changed the timing chain and gears on my 91 3.1 v6 Firebird.


And everything from the top end including two Fuel injectors, M.A.P sensor, IAC,TPS,EGR Ignition coil. Last but not least Distributor Cap and Rotor. New Platinum Plugs


I didn't need to change the other fuel injectors because they were working properly.

I also changed the ECM.Which was necessary and resolved some of the bogging out issues..

But

I heard something that just wasn't right when the engine was running.


So i pulled a plug wire #6 from the spark plug ..no change in the engine idle..I pulled the second plug wire #4..Again no change in idle. Then the third plug wire #2..


And still NO CHANGE IN IDLE 750 rpms steady.. All THE WIRES THAT WERE PULLED WERE GIVING OFF SPARK.


All the wires were giving off spark and yet the engine acted like it didnt need those three wires to operate....spooky.
What else The car is falling flat on its face after second gear kicks in. Meaning on acceleration at/after second gear it decelerates grossly.


To the best of my memory the timing gear marks were aligned properly..The timing light says the timing is dead on. The fuel compression is acceptable. And each of the cylinders is between 150 and 175 lbs of compression as well. No vacuum leaks I know of yet..lol
Nothing is clogging the exhaust timing is dead on.
New this and New that c'mon now That just gets old faster than the car can run right now.
What the heck is going on ..This is impossible! !
Anyone ever have this problem..If so. I couldn't find it posted.
I hope the answer is out there because i sure need an answer . What is making the car run like this on only three cylinders while sparking for 6 cylinders?


This car shouldn't be running at all
Someone please Help me with this.

 

If it is getting spark and compression the only other thing that seems possible is no fuel.

 

I know ...lol But its got a half tank.

 

Not tank bro, probably fuel injectors, fuel injector wiring harness, fuel rail, or ECM if I had to guess, get it idling and spray some starter fluid into the intake system, see if the idle changes at all, if it does then its definitely not getting fuel on that side. Also, double check that the injectors are all the way into the intake manifold, oh and could also be FPR maybe. But honestly if it has spark and compression it HAS to be fuel or bad timing, either ignition or valve..

 

It's not impossible for the engine to be running on one bank (been there). It, as you've noticed, will run like garbage on only one bank, but it will run. Check for power on both pink wires in the fuel injector harness.

 

magnetic pick up in dizzy, and it can't be changed without pullin it out and taking the dizzy apart.

They are built in 2 parts. 3 cylinders each

 

Yes i did notice it runs like garbage..couldnt help that one..lol
When you had this problem.
Were there any other things i should check besides the power to the pink wires on the fuel harness?
I'm doing this today so if there's anything else to look at to help cure this let me know.
I cant believe i found someone that has had this happen to them so anything you got on the subject is good for me.
Thanks

 

I already bought another distributor. Maybe. Maybe Not..I will let you know what happens..im waiting for it to come in as i type..
Thanks

 

check the fuses, theres a fuse for each bank under the drivers side of the dashboard in the fuse block.

 

I checked all the fuses. The fuel is spraying from ALL the injectors like a day in the water park!..

The fuel pump is next i am gonna hook up a HighPerformance pump to the fuel filter and give that a try. Just to see if the pump is the problem.

 

so youre getting spark at all the wires AND fuel? hmmm thats odd i dont see how if the fuel pump was defective, how only one side would work properly.

maybe somethigns up with the spark plugs?...fouled, gap is bridged etc....its kinda hard to believe that all 3 would go at once ...but then again you never know!

 

could u have installed the dizzy 180* out? would cause firing at all the wrong times.

 

I checked everything all the fuel injectors are spraying like they should. The fuel is getting to both sides..Of course the injectors are all the way in.

 

The Plugs are all new Platinum plugs. EVerything that has been done to the car is in the beginning of the thread.

 

No the distributor wasnt set wrong.I am waiting on another anyhow to see if the magnetic pickup has anything to do with it.

 

I really am screwed. I only have a two more options left. and if they dont work i dont know what i am gonna do with a perfectly good motor that no one can fix...WTF Its not like engines are all over the place for free. And theses newer cars. I wouldnt trust my life behind the engine compartment of any of these soda pop machines.

 

To make a long story short It winds up being the FPR and
that fuel pump i hooked up to it(see thread) swirled around some junk in my tank so i need new injectors too.

Good thing for SouthBay injectors and the current %10 discount. I can get 5 injectors for 90 bux.with a 3 year warranty on all reman injectors.
5 because thats all i will need. The 6th was a different brand.
NO I AM NOT AN ADVERTISER..Just someone who knows
that's a darn good deal. And i found it here. Even better.
Spreading the word.. .
Because that's the deal of the century as far as i am concerned...!

Anyway I wanted to thank everyone for their input.
THANK YOU!