RICH CONDITION, HARD STARTING... HELP? :(

[S2LEGEND]

Hey everyone. Need some guidance/suggestions. Here's the story:

THE PATIENT:

1989 Ford Bronco XLT

4.9L FI 6cyl, 5 speed manual

118k miles

THE SYMPTOMS:

heavy fuel odor

runs rich

fouled plugs

hard starting, need to use the throttle to fire it up

exhaust is white-ish upon startup

erratic idle with a 300 rpm surge and drop. does not stall.

THE TREATMENT:

I've changed the AIC, and put the factory spark plugs in.

Oil change was also done.

timing was set 10 degrees BTDC

There is a hole in the A.I.R. tube going from the cat back to the motor.

IDK what else to do. I was thinking it might be the Fuel Pressure Regulator. The odor is fouling my interior /emoticons/[email protected] 2x" width="20" height="20" />

Suggestions?

Thanks, B)

Phill

 

[BroncoJoe19]

Pull Diagnostic Trouble Codes (DTCs) From your onboard computer.

Your engine and transmission are computer controlled.

The computer uses sensors to tell it a number of different things and it controls actuators that push or pull mechanical levers (kinda). If one or more sensors aren't working properly, the computer goes "blind" and doesn't know what to do. If the computer can "see" but one of the actuators is broken and therefore can't follow the commands of the computer; the engine won't run correctly. The computer is preprogrammed with set values for each of its sensors, and each of its actuators. It will run a self check of all systems, like the space shuttle; it will compare its set value(s) to the value(s) it recieves from its sensors, and actuators. If any sensor or acutator is out of the "normal" range the computer will generate a "code." It will generate some codes on the fly, and others will be stored while you are driving. There is a simple method to "pull codes" out of the computer for one to use for diagnostic purposes.

Earlier versions of On Board Diagnostics OBD 1983-1995 can flash the error code to the dash board and can be pulled in one's driveway without any special tools.

Later versions of On Board Diagnostics OBDII some 1995, and pretty much all 1996 and newer, require one to use a code reader or scanner tool.

Some auto parts stores will scan your engine codes for FREE, you may want to call around. Some will scan OBDII but not the older (prior to 1996) OBD systems.

SO here you go...

How to scan FORD on board Diagnostic Trouble Codes (DTCs) in your driveway

Howto Pull Codes 1983-1995 Broncos, Mustang, F series Trucks, Econolines, 302, 351 and more