Fuel injection, no start?

Tiny
WIZARD BK
  • MEMBER
  • 1994 FORD E-SERIES VAN
  • 7.5L
  • V8
  • 2WD
  • AUTOMATIC
  • 50,000 MILES
This motorhome has been sitting since 2019. It ran fine, was parked in a campground, I went to start it and it seemed like a fuel issue. I have replaced the following. Fuel Pump, Filter, Fuel Pressure Regulator, Air idle control Motor, and a new Battery. If fuel is sprayed in the intake, it starts fine for maybe 3 seconds and then shuts down. I don't know what to do next. Any ideas what to look at next?
Friday, September 22nd, 2023 AT 11:16 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,268 POSTS
Hi,

If it starts with starting fluid and then stalls, it isn't an ignition issue. Instead, it is a fuel-related issue.

If possible, take a look through this link, it explains how to retrieve codes:

https://www.2carpros.com/articles/ford-lincoln-mercury-obd1-1995-and-earlier-diagnostic-trouble-code-definition-and-retrieval

Do you hear the new pump prime the system? Have you checked the fuel pressure? If not, that needs to be done.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

You will need a fuel pressure gauge, but most parts stores will lend one to you. I attached the manufacturer's fuel pressure specifications below for you.

If the fuel pressure is good, then we need to confirm the fuel injectors are getting power and a ground signal to actuate.

If you look below, I attached a pic of the injectors/wiring (pic 2). Note that each injector will have a red wire. With the ignition key in the run position, that wire at each injector should have battery voltage. Check that for me as well.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-wiring

Let me know what you find.

Take care,

Joe

See pics below. Note: I'm not sure which chassis was used to build the camper. I went with an E350. If that is incorrect, let me know what you have and I'll confirm the information I provided.
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Friday, September 22nd, 2023 AT 2:13 PM

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