axiomatik
04-04-2009, 02:14 PM
So, I'm a little stumped. Redtop SR in a '89.
One day a few months ago, I started up my car and it ran like crap. After determining that it was running on 3 cylinders, I narrowed it down to the #1 injector. Swapping the #1 and 2 injectors caused the problem to swap to cyl #2. For a while, I was trying to mess around with some used injectors I bought off a fellow premie, but I was not getting anywhere. I couldn't get the car to start at all, even though it had previously started no problem on 3 cylinders. I was starting to worry that another problem had arisen.
I made sure that I had spark on all four cylinders, and I pulled the fuel rail out to check if the injectors were indeed firing. As expected, injector #2 wasn't. I swapped it back to cyl #1, pulled the rail out a bit (though still had the injectors aimed into the manifold), had my wife crank it, and voila, I had ignition, even though cyl #1 had no fuel. I had her kill it right away, since my oil is full of gas from pulling injectors so many times.
So, I bought a new injector, put it in, thinking my problem was solved, cranked it, and got nothing. It just turns over and I never get ignition. I decided to pull the fuel rail again to make sure cyl #1 was now getting fuel. I had my wife crank it, and again, I got ignition. So I bolted the fuel rail back in, go to crank it, and I get nothing. It just cranks and cranks.
What could be going on here? If i pull the fuel rail out 1/2", it'll start, but if the rail is properly installed, I get no ignition. The engine is probably pulling a little more air in the cylinders than it otherwise would, but it seems unlikely that my MAF would have just so happened to fail exactly at the same time.
Last question, and it may be pertinent. When I pulled my fuel rail and watched the injectors, I was surprised to find that they all fire at the same time. Are they supposed to?
Apologies for the novel.
One day a few months ago, I started up my car and it ran like crap. After determining that it was running on 3 cylinders, I narrowed it down to the #1 injector. Swapping the #1 and 2 injectors caused the problem to swap to cyl #2. For a while, I was trying to mess around with some used injectors I bought off a fellow premie, but I was not getting anywhere. I couldn't get the car to start at all, even though it had previously started no problem on 3 cylinders. I was starting to worry that another problem had arisen.
I made sure that I had spark on all four cylinders, and I pulled the fuel rail out to check if the injectors were indeed firing. As expected, injector #2 wasn't. I swapped it back to cyl #1, pulled the rail out a bit (though still had the injectors aimed into the manifold), had my wife crank it, and voila, I had ignition, even though cyl #1 had no fuel. I had her kill it right away, since my oil is full of gas from pulling injectors so many times.
So, I bought a new injector, put it in, thinking my problem was solved, cranked it, and got nothing. It just turns over and I never get ignition. I decided to pull the fuel rail again to make sure cyl #1 was now getting fuel. I had my wife crank it, and again, I got ignition. So I bolted the fuel rail back in, go to crank it, and I get nothing. It just cranks and cranks.
What could be going on here? If i pull the fuel rail out 1/2", it'll start, but if the rail is properly installed, I get no ignition. The engine is probably pulling a little more air in the cylinders than it otherwise would, but it seems unlikely that my MAF would have just so happened to fail exactly at the same time.
Last question, and it may be pertinent. When I pulled my fuel rail and watched the injectors, I was surprised to find that they all fire at the same time. Are they supposed to?
Apologies for the novel.