Not Starting -Fuel

tbauer03

tbauer03

TRBOBOX
I took apart the top end of my motor over the winter to clean it up. I got it put back together but now it is not starting.

I am getting spark, and I believe fuel at the rail. I hear the fuel pump running before i start and a few seconds afterwards. I do not have a fuel pressure gauge on the rail. It would have been a good idea to add one while I had it apart.:banghead: But the truck starts and runs while I am spraying starting fluid into the intake, but dies after i quit spraying which is why I believe I am not getting fuel past the injectors and the timing is close enough to run the engine. It has about a 1/4 tank and it has only been sitting for about 3 months.

I checked ecm fuses and electrical connections and they all appear to be good. I concluded it was probably the ignition module not sending the signal to open the injectors because that has happened to me before. I took the module to advance auto and it tested out good. but i went ahead and bought another one. BWD not AC Delco, installed it and nothing has changed. Any ideas on what else it could be? Or where to start looking for something I missed while rebuilding it.

Thank you,
Ted
 
S

Static

Member
Re: Not Starting -Fuel

Probably should verify pressure at the rail. Go back to advance and rent the pressure tester.
 
tbauer03

tbauer03

TRBOBOX
Re: Not Starting -Fuel

I should have clarified I have billet fuel rails and there is no provision for a schradder valve like the stock fuel rail.
 
Don W.

Don W.

Stab it and steer it
Re: Not Starting -Fuel

tbauer03 said:
Yeah it bounces right around zero it never jumps unless it fires. What does that tell me?
And I double checked the harness is plugged in.
Click to expand...



Generally speaking it means you're getting a trigger signal to the ECM. Have you check fuel pressure yet? Billet rails I know but you're gonna have to figure a way.
 
Daryl H

Daryl H

Donating Member
Re: Not Starting -Fuel

Is there any fuel in the tank?

I would crack the fitting at the fuel filter after I replaced it.
 
tbauer03

tbauer03

TRBOBOX
Re: Not Starting -Fuel

I ordered the an fuel pressure fitting and a gauge. I will switch out the fuel filter and get back with the results hopefully by sunday if that fitting comes in the mail by Saturday.
 
Don W.

Don W.

Stab it and steer it
Re: Not Starting -Fuel

:2cents:My opinion only but I doubt it's the fuel filter unless it's totally plugged for some reason like water. IOW it should be at least passing enough fuel to start. Buuut.. Prolly worth it for peace of mind. Shake it out and try to blow through it. :2cents: Fuel pressure will be the answer, or not.
 
Daryl H

Daryl H

Donating Member
Re: Not Starting -Fuel

I know its not the fuel filter. However....why not change it out and see if there is fuel pressure, gas in the line or crud.
 
Slyclone

Slyclone

Well-known member
Re: Not Starting -Fuel

I would just bank on dropping the tank and replacing the pump with a High performance unit if you have not.

I am a strong believer all these trucks should be updated with a upgraded fuel pump/system.

Here, I drove around for months on a pump that was shot. My truck was running, but not up to par. Upon my removal I bench tested my OEM/stock pump and it sounded SICK. and yea, I was getting poor fuel pressure readings off the bat- chasing fuel regulators... fittings..lines.. I did the pump- things were night and day. I ran into the fuse problem and purchase a Hotwire and never got around to it.


To add, I have a pile of the ECM moduel's BDW like you mention, a brand new ACCEL and a Original GM I replaced. Nothing changed. I thought the same thing at one point.
 
tbauer03

tbauer03

TRBOBOX
Re: Not Starting -Fuel

Just changing out the filter because it is probably over due. And the fuel pressure gauge would be nice to have regardless.
I have upgraded the pump to a walboro high flow pump and it has an upgraded power supply coming directly off of the alternator. Fuses are good.
I am guessing I am having some sort of electrical issues with the injectors or I am missing something really stupid.
 
tbauer03

tbauer03

TRBOBOX
Re: Not Starting -Fuel

I got the fuel gauge hooked up and and it read a constant 40 psi while cranking.
My wife recorded a short video while I cranked the engine if it gives you any indication on what might be going on.
http://www.youtube.com/watch?v=7LXWEynTES8&feature=youtu.be
20130321185323.jpg
 
tbauer03

tbauer03

TRBOBOX
Re: Not Starting -Fuel

Read through that post #13 and it went over my head pretty quick. I somewhat gathered that it might be a bad ecm which Zach had one here locally so I tried swapping that out because it was easy but it did nothing. I pumped all the old gas out and replaced it with fresh gas to rule out the fuel quality. But it still won't fire. What would you guys suggest next?
 
Syclone#892

Syclone#892

Member
Re: Not Starting -Fuel

Go buy a noid light kit
http://www.amazon.com/Astro-Pneumat...TF8&qid=1364679973&sr=8-5&keywords=noid+light
They are cheap and you can probably find it locally there are tons of brands that make them.

What you do is unplug an injector and plug the light in then crank the engine if the light flashes you have injector pulse and can move on from there. If no flash then you need to look into ecm/wiring to find out why.
How have you checked that you are getting spark? I like to use one of these
http://www.amazon.com/Lisle-20610-I...=1364680108&sr=8-1&keywords=spark+plug+tester
You can plug it in at the head and if you have no spark you can plug it at the dist cap and see if you have a bad wire.

Have you tried the old test of spraying some carb clean down the open throttle body and seeing if it will start or cough? That is usually my first step to tell if the problem is ignition or fuel related.

Hope some of that helps and good luck with the project :D
 
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