89 302 bronco running too rich

It is running really rich, I have changed the oxygen sensor, spark plugs, and computer temperature sensor. All the plugs were fouled up, and it has a strong spark, so I know all cylinders are firing. It has 38psi fuel pressure, so it's not the regulator. I'm at a loss as to what it is, even the past owner and a mechanic. any advice? It smokes and has hardly any power, and won't accelerate and is barely drivable.

Did you change your air filter, and clean your IAC?

What color is the smoke?

You may also check compression.

Ran it with the air filter removed, and it didn't change it at all. Filter isn't dirty or damaged looking either. Smoke is kinda blueish white, and it doesn't smoke much once it warms up. Engine rpms vs. speed are completely different and it tops out at 50mph now. What is the IAC?

Blue smoke is oil, white smoke is steam, gray smoke antifreeze. Steam at first might be just condensation being burnt off. You might want to do a compression test.

 

HowTo check your IAC

 

http://www.fordforumsonline.com/forum/engine-drivetrain/261-howto-check-clean-your-idle-air-control-valve-iac-iab.html

YO,

GOOD STUFF JOE!

also, check the PCV Valve & hose. Engine can "blow oil" when da PCV valve/hosesis clogged or not functioning/or disco'ed.

If there are any cracks/breaks are noticed in the hose, it should also be replaced. All hose connections should be inspected to assure an air-tight seal.

A bad PCV Valve can/will also cause oil leaks @ valve covers, oil pan....etc.



Location pic; and by trh, "...PCV valve is next to the passenger side valve cover below the intake plenum..."

Source: by Steve83

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Location pic in an 88 F 150 5.0

Source: by Steve83

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Info & pic, 1 port vs. 2 port for 5.0; "...That's a genuine Ford PCV valve. It's stock two port top (top of pic); makes it difficult to fit under the upper intake on an EFI 5.0 engine. Buy an aftermarket single port(lower in pic) and use the top on the Ford PCV..." miesk5 Note, often the rubber cap on the top port pops off Source: by Sixlitre (Malcolm H, Eddie Bauer) at SuperMotors.net

If it is da PCV

Consider this;

Vacuum Supply Hose Rerouting in 87-93 5.0 Bronco, F Series & vans; Failure of the #8 piston or the #8 rod or rod bearing; "...Failure of the #8 piston or the #8 rod or rod bearing in Ford 5.0L, V-8 gas engines. Solution: During engine installation, reroute the PCV valve vacuum supply hose. Follow these steps: Plug the 3/8" (pipe) thread hole in the rear of the plenum where the PCV valve hose is connected. Drill and tap a 3/8" pipe thread hole in the center of the plenum and thread the PCV connector into it. Reconnect the PCV valve vacuum supply hose to the new location. Be sure the drain hole in the baffle is open. The baffle is under the PCV location in the valve cover. Installers who have rerouted the PCV system and opened the baffle drain hole have not reported any #8 cylinder failures..." Source: by fourstarengines.com via web.archive.org

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Vacuum Supply Hose Rerouting in 85-97 Bronco, F Series & vans; Failure of the #8 piston or the #8 rod or rod bearing with 5.0L and 5.8L engines. Failure of the rear piston, rod, or rod bearing (cylinders 5 & 8). After discussing the situation with several installers, the problem has been narrowed down to the PCV system. This picks up crankcase gasses from above the #8 cylinder and dumps into the back of the intake. Miesk5 NOTE; I Don't know where Ryan got the year range and #5 cylinder info from.. most likely is a typo....read more... Source: by Ryan M (Fireguy50) at fordfuelinjection.com

note that this is just for the Vacuum hose not da valve.

Vacuum Leak Test; On an idling engine check for vacuum leaks using a mechanic's stethoscope with the probe removed, or a ~3' garden hose section. Don't spray flammables on a running engine. MIESK5 NOTE; Also check: vacuum hoses; intake manifold gasket & throttle body; PCV line; vacuum reservoirs: EGR Sys Vacuum Tank & 2ndry air (coffee can); AC, heater, defroster, vent control ckt & vacuum tank (plastic ball type), under dash & lines to heat/blend/etc. doors; power brake booster; cruise control ckt, etc.... where applicable; (combined w/ Steve83's info, thnx) BEWARE OF BELTS/PULLEYS, FAN AND HOT ENGINE

It's for sure not a vacuum leak. we checked compression, it's at 135. Changed map sensor, and checked throttle positions sensor. It still runs like crap...

It doesn't smoke anymore btw.

Ok, so after replacing and troubleshooting just about everything, I think it's either a clogged up cat, or the computer. So I need to get a A9l or A9P computer I think, it has mass air on it and is an automatic. Is this the right computer? And which is better?