88 Ford Ranger

[rotorwrench]

1988 with OBD 1 is getting back there in an era where they were trying to develop the technology with very little standardization yet. The pressure regulator can only be checked with a fuel manifold pressure gauge. If it has a check valve then it has to hold pressure and should maintain it for a while after the engine is shut down. The scanner for those systems should read MAP and throttle position in the normal range. It likely won't have any fuel pressure monitoring capability and that's why it won't throw a code.

[KULTULZ]

It likely won't have any fuel pressure monitoring capability and that's why it won't throw a code.

In addition there may be code(s) thrown for the O2 SENSOR(s).

All of this is shiat simple. The vehicle has an ECM. You read what it has recorded.

If it points to a fuel pressure/delivery volume problem, you use a fuel pressure gauge.

The FORD WSM for the particular vehicle has a COMPLETE DIAGNOSTIC SEQUENCE that gives step by step instructions to diagnose a problem(s).

The TECH uses this, pulls codes, checks for any applicable TSB's and goes into diagnostics from there.

Hosting guessing games on message boards ain't gonna get it.

Pointing a PARTS CANNON at it and buying CHI-COM parts ain't gonna get it.

[scicala]

Originally Posted by KULTULZ

In addition there may be code(s) thrown for the O2 SENSOR(s).

All of this is shiat simple. The vehicle has an ECM. You read what it has recorded.

If it points to a fuel pressure/delivery volume problem, you use a fuel pressure gauge.

The FORD WSM for the particular vehicle has a COMPLETE DIAGNOSTIC SEQUENCE that gives step by step instructions to diagnose a problem(s).

The TECH uses this, pulls codes, checks for any applicable TSB's and goes into diagnostics from there.

Hosting guessing games on message boards ain't gonna get it.

Pointing a PARTS CANNON at it and buying CHI-COM parts ain't gonna get it.

Pretty sure '88 Ranger was just two digit trouble codes.

Sal

[KULTULZ]

Pretty sure '88 Ranger was just two digit trouble codes.

You're right but I was trying to make a point.

Here is a two character code chart - https://www.troublecodes.net/ford/#codesobd1

There are references to fuel. A code (or combination) may not point directly to fuel delivery but it should point you in that direction. A fuel pressure gauge (EFI) is necessary to properly diagnose if the code(s) lead you in that direction.