1990 Ford Bronco Stalling - Engine

Question: I have changed the spark plugs, cap, rotor, iac, engine coolent temp sentor.the #2 plug is wet from fuel but all the plugs are geting fire. i did compression test on both sides and it was 150 except the #2 was 120. can someone help me ? thanks Michael

Here's How To Get Guaranteed Solutions In Minutes

Technican: The lower compression can be caused by gas washing oil out of the piston rings. You didn't say which engine you had but it should have a fuel injector for every cylinder (Multi Port or MPI). The injector may be stuck open and leaking. There are a couple ways to check, take your pick. 1. Install a fuel pressure gauge and turn on key until pressure builds up. Pinch off the return line. If pressure steadily drops off the injector is leaking. 2. You can swap the number 2 injector (with another injector, any injector that is conveniant) and see if the problem moves to the new cylinder Some people will pull the injectors and watch them to see if they leak. I can't recommend this because of the risk of fire. A more remote possibility is the power to the injector. The computer provides an on off ground to 'fire' the injector. If the injector ground wire is shorted to ground the injector will run continuously with key on. You can determine this by listening to the injector to see if it runs constantly. Another problem with fords was the fuel pressure regulator leaking. Pull the vacuum hose off the regulator and see if it's wet with gas. If it is replace the regulator (this specifally applies if the vacuum hose is located near the #2 port on the intake manifold)"

Owner: could timing gears or bad cam shaft

Technican: Squirt some oil in the #2 cylinder. Recheck compression. If compression increases much the problem is worn rings (or likely in your case the gas has washed the oil out of the rings). The timing gears would not affect just one cylinder. Camshaft could effect one cylinder. How does the engine run? Is it fine outside of one cylinder missing? How many miles on engine?

Here's How To Get Guaranteed Solutions In Minutes

More Bronco Answers

Home

Ford Answers

Aerostar
Aspire
Bronco
Bronco II
Club Wagon
Contour
Country Squire
Crown Victoria
E 150
E 250
E 350
Econoline
Escort
Expedition
Explorer
F 100 Pick up
F 150 Pick up
F 250 Pick up
F 350 Pick up
Falcon
Festiva
Fiesta
Focus
Granada
LTD
Lightning Pick up
Mustang
Mustang Convertible
Mustang GT
Mustang Mach I
Mustang Notchback
Mustang Sedan
Probe
Ranger
Ranger Pick up
Sedan
Taurus
Tempo
Thunderbird
Touring
Windstar
ZX2
a_old

Home

template