mauser1111
New member
- Joined
- Dec 25, 2007
- Messages
- 16
- Reaction score
- 0
I have a 1987 bronco 2 that ran fine when I got it but started to miss every once and a while and then one night started missing very heavily like a cylinder wasn
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
I have a 1987 bronco 2 that ran fine when I got it but started to miss every once and a while and then one night started missing very heavily like a cylinder wasn
I have a 1987 bronco 2 that ran fine when I got it but started to miss every once and a while and then one night started missing very heavily like a cylinder wasn
you know, your problem might not be the spark, but the ground to the computer that's connected to the battery terminal. check that, it has a slip connection that can become loose or disconnected and cause this problem.
I can't believe that no one suggested pulling codes.
I like BroncoBill slid on over from the full size broncs to take a look over here.
It looks like you are changing a lot of parts, which can be expensive. Talk with one of the techs at work to find out how to pull codes. Get a manual as suggested by SeaBronc, and go from there.
joe
Oh one more thing...Please let me suggest this...you have been beating yourself up replacing sensors and other electronics.
The one code you did get, you may have fixed.
It seems like you already replaced most of the controlling electronics.
When your truck was running... it had a miss.
What could that be?... bad cap and rotor?
Bad wire to one cylinder, or wire not fully seated to the plug
bad plug
bad injector
The missing got worse, and quit running.
More wires and plugs suddenly went bad? Not likely, unless...
the wires were bad, but functional and then got wet, OR
the plug wires had been removed, and more than one was not fully seated (with use and vibration they may have worked themselves out enough to not make contact)
IF it was starving for fuel, it might lose power and sputter before stalling.
Bad fuel pump
clogged fuel filter
tripped inertia switch
Could a bad tank of gas affect multiple injectors?
Could water have gotten into the tank?
If the timeing chain jumped a tooth I'm not sure of the symptoms... loss of power, spiting and sputtering, maybe back fireing. It may not restart. Check compression.
An error I made more than once was in replacing plug wires or cap, and getting the wires crossed. Check the fireing order, and make sure they are properly put back in order.
Now it is recommeneded that one uses dielectric grease when installing plug wires at both ends of the wire.
This is just my line of thinking, I am a novice, and am sure that some of the more seasoned gentlemen here would be able to flush this out a lot more.
joe
BY any chance did you check your air filter?Does it still have a miss?
Does it sputter and surge at idle before it dies, or does it just turn off like someone reached over your shoulder and turned the key off.
OK... great! AT least that eliminates one possible cause.It just shuts off like someone turned off the key. I just had it running again tonight, for about 3 minutes or so. First I did away with the inline connector from the PIP to the computer I believe, to see if it was holding it back. That's when it ran but I think it was just coincidental, and then it shutoff a soon as I reached in for the key, a soon as I touched it. It then wouldn't restart. I just did away with the ignition switch and made up a starter button to turn it over, and a toggle switc for the ignition, just so I can eliminate a bad switch.
Something is wrong here. If you held the plug away from a ground, it should not have sparked at all.I also checked the fire at the coil wire coming from the coil with an extra spark plug. I held it away from a ground source,cranked it and the fire was intermitten, like it would fire a couple of times and then wouldn't fire at all. Does that sound like a bad pickup coil in the distributer, can they work good every once in a while and then other times not work at all?
Thanks for all the help every ones benn giving me, Id be pretty lost without the internet right now.
OK... great! AT least that eliminates one possible cause.
Something is wrong here. If you held the plug away from a ground, it should not have sparked at all.
You should have held the plug to a ground to see if there is a spark. You see the engergy from the coil travels through the plug to the center electrode and jumps the gap of the plug to get to a ground. When the plug is screwed into the cylinder head, it is grounded. If you were holding it in the air, away from a ground, I don't know how or why the spark would jump the gap.
I am trying to envision how this could happen, and the only thing I can think of is that the outside of the plug is covered in oil or grease, and so are the wires, and that somehow it is reaching a ground that way.
See if others agree... you may have a bad coil wire.
I personally do not know what controls the rate of fireing of the coil in your truck.
Sorry.
joe
I think that a bad coil wire could give you an erratic spark.Sorry I ment I held at a ground. I assumed the Pickup coil controls when the coil needs to send fire to the distributer, so that spark doesn't arc between two plug electrodes under the distributer cap. Which I think could be a problem if it was allowed to spark whebnever it was close to one of the electrodes.