question about b2 surging.
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 144
Likes: 0
question about b2 surging.
aight guys even though i don't currently own a bII, i used to. In fact, A 1987 eddie bauer bII was my first car which i drove right up till the summer of 2002. however the bII gave me many headaches and problems. the most prominent problem was a condition where it would surge (i.e. buck) while spitting black smoke out of the tailpipe. However, if i turned it off then turned it back on the problem would usually go away. This pronblem stayed with me for, at least, 2 years and when the mechanic finally got it fixed he didn't tell us exactly what he did. This is my question to you. what was causing this problem that i spent so much time and money on?
Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
Kind of hard to diagnose a problem post mortum, but I would first ask if you ever ran the EEc-IV self-diagnostics (aka "pulled the codes") or checked the fuel pressure or verified the integrity of the vacuum lines.
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 144
Likes: 0
yeah i was thinkin it was a vacuum line.
no, i never pulled the codes personally. heck i was only 15 0r 16 at the time it was doing it, so my mechanic did all the code pullin. (since then i have taken a more hands on approach with my vehicles
) i was too much into the young ladies to worry about workin on my vehicle!!
anyway it stayed in the shop forever. guess i had an idiot mechanic.
no, i never pulled the codes personally. heck i was only 15 0r 16 at the time it was doing it, so my mechanic did all the code pullin. (since then i have taken a more hands on approach with my vehicles
) i was too much into the young ladies to worry about workin on my vehicle!! anyway it stayed in the shop forever. guess i had an idiot mechanic.
Thread Starter
|
Senior User
Joined: Dec 2003
Posts: 144
Likes: 0
Trending Topics
Postmaster
Joined: Dec 2001
Posts: 3,742
Likes: 2
From: UT
I wouldn't say that. I find it works quite well. Based solely on my own experience, I've had more problems with the MAF based system on my 4.0 L.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
New User
Joined: Feb 2004
Posts: 4
Likes: 0
From: Indiana
Bonco II surging at idle/ black soot
My 1988 model Bronco II is currently surging at idle and blowing black soot at startup. I had the codes checked since the "check engine light" had been coming on intermittently and it showed the oxygen sensor had a bad reading. My mechanic suggested I change the sensor, so I did but the surging continues. Apparently, the Oxygen sensor code was caused by this other problem. Does anyone have any good ideas for finding the cause?
Thanks,
ma8
Thanks,
ma8
New User
Joined: Feb 2004
Posts: 4
Likes: 0
From: Indiana
Well I'm back and the Bronco II is running right again. Thanks for the help! The fuel pressure regulator was reading over 100 PSI after about a minute of idle time. That explained the black soot in the exhaust and the spark plug's carbon deposits from burning such a rich mixture.
The code 41 that I got prior to changing the O2 sensor (which meant a lean mixture) stemmed from the soot plugging it up which made the code a little misleading.
I still have a question about vacuum. I tried to apply vacuum to one of the vacuum trees coming off the manifold with the engine off to check for leaks in the system but it would not hold vacuum. Is there a reason this won't work or do I have another problem to troubleshoot and if so, is there another way to check for leaks?
Another problem I found was fuel pressure leaking off during KOEO. It is probably the fuel pump check valve since it has a new regulator, but I'm wondering if this is all that critical to engine performance and whether I should continue troubleshooting this or just be satisfied that it is not surging anymore.
The code 41 that I got prior to changing the O2 sensor (which meant a lean mixture) stemmed from the soot plugging it up which made the code a little misleading.
I still have a question about vacuum. I tried to apply vacuum to one of the vacuum trees coming off the manifold with the engine off to check for leaks in the system but it would not hold vacuum. Is there a reason this won't work or do I have another problem to troubleshoot and if so, is there another way to check for leaks?
Another problem I found was fuel pressure leaking off during KOEO. It is probably the fuel pump check valve since it has a new regulator, but I'm wondering if this is all that critical to engine performance and whether I should continue troubleshooting this or just be satisfied that it is not surging anymore.
Post Fiend
Joined: Dec 2001
Posts: 10,562
Likes: 4
From: South Jersey
I'm not clear on how you were checking vacuum. If you attached the vacuum pump to the tee on the manifold you wouldn't hold vacuum since the manifold haa a big leak, the throttle body. If you were attached to a vacuum line goig to something then yes you have a problem. To check for leaks atached to the hose, for gasket leaks spray carb cleaner around them while the (cool) engine is running and see if you get an rpm change, change = leak.
If you had leaky injector(s) you will have black smoke at start up, otherwise I agree about the check valve since you have a new FPR.
If you had leaky injector(s) you will have black smoke at start up, otherwise I agree about the check valve since you have a new FPR.