QuestionI appreciate all of your help! My husband was able to check the injector last night and it is working like a champ. I mentioned the ignition switch and he said he will try that this weekend. I guess we will also be spending the weekend searching for a loose wire also. Is there any way to test the ignition module?
Again, thank you for your suggestions!!
-------------------------
Followup To
Question -
It does make noise when the key is turned, but it just cranks and cranks, it won't catch and start.
There is a spark - it is getting fire.
The fuel pressure is perfect - we checked it after replacing the fuel pump this weekend.
How can I check power to the injectors? We checked all the fuses, but I do not how to specifically check the power to the spider injector.
I was thinking the ignition module, but I wasn't sure. What about the timing chaing - could that cause it?
Trying to find a loose wire is going to be tough, but we can sure try.
Thank you so much!!
-------------------------
Followup To
Question -
For the past few months, my Bravada has been intermittently stalling. The following are the things that we have replaced to no avail: Coil, Fuel Injection System, Fuel filter, fuel pump, starter, alternator, intake hose, fuses, and spark plugs. It now won't even start. We have been to see numerous mechanics with no correction of the problem. Any suggestions?
Answer -
Hi Kim,
More info needed....
Does it not even make any noise when the key is turned?
Does it crank over but not start?
If it cranks over, is there spark?
Is ther fuel pressure? (13PSI if it is throttle body)
Is there power to the injectors?
If there is power to the injectors, does it pulse or blink while cranking?
From what you said, an ignition switch or a loose wire could cause it, but I would sure want to check them before replacing anything.
Van
Answer -
Hi Kim,
OK... first, if it is central point injection, I am pretty sure the pressure needs to be a lot higher than 13, but sounds like you know what it should be.
Ignition module? Maybe...but there is spark. Weather it is at the right time, guess the timing chain could affect that, but unless it has a couple hundred thousand miles, I would doubt that. Still...could be.
You may need to remove the top half of the plenum over the injector/spyder assembly.
That is something I have not personally worked on, but what I have seen in the manuals, if any of the plastic hoses breaks, comes loose, etc, none of the poppets will get enough pressure to open.
Have you tried any starting fluid in the intake by chance? May not be recommended in any manual, but a little shot could tell if there is spark, and at the correct time. If it would hit on the fluid, I would be looking closely at the injection system.
Van
AnswerHi Kim,
I realize the injector may be squirting gas out of a line pulled loose, and you said the pressure was good, but if there is spark, and fuel, it should run.
I am curious if you checked the fuel pressure with a gauge.
The pressure needs to be more than just looking good. It needs to have 54 to 64 PSI when not running. The poppets require 54 PSI to open and spray fuel. Less than that, and no fuel gets into the cylinders.
If the fuel is pumping, and there is spark, the switch and connections are probably fine.
Van
