need help getting the bronco running - Page 2

IlovemybroncII · 02-14-2010, 01:24 PM

ok this is just another hint may or may not be problem but on my 05 f250 i would get high rpms and no power run like crap throw all kinds of codes and what it end up being was the screen on the fuel pump was so cloged up with crap would get fuel then it would not I removed screen and that was a big mistake truck would not run at all put new way too damn costly fuel pump in run like new hope this helps

shawn.m · 02-14-2010, 02:27 PM

remember this is a 93 4.0 with MAS air and dual O2 sensors. I have a Air/Fuel O2 meter sitting on my shelf that I think I might throw on just for fun.

TPS voltage is .95 at close with a smooth trip to 4.5 -TPS and MAS sensor were both replaced.
I am thinking of dropping the tank and cleaning it just to make sure that the fuel pump screen is not plugged or blocked. Has new fuel filter also.
bought a fuel pressure gauge today so I can do the KOEO fuel pressure test and the running one.

shawn.m · 02-14-2010, 08:44 PM

ran new vacuum line from EGR purge solenoid to EVAP cannister.

Opened my new Fuel Pressure Gauge. Fuel pressure KOEO fuel pressure was 38psi, steady state 32PSI and goes up to 39PSI as soon as you hit the gas. So that is not the issue. Vacuum steady state is 18 in.

Big thing I noticed after doing all the Grounds correctly and redoing the positive cable was that the charge voltage shot up to 16volts. Drove it around the farm again for a while charging the battery. Now the hesitation dieing is gone!

Idle is now 1000 rpm and it runs great! Lots of power down to 1500rpm and up to 5500. Had all 4 wheels spinning in a mud puddle

SO STOKED!

:

So final analysis may be that battery voltage was not where it needed to be and then the computer needed to relearn everything after proper grounding was done.

next up is smog test and title transfer

IlovemybroncII · 02-15-2010, 05:27 PM

yay very happy you found problem way to go

shawn.m · 02-15-2010, 05:41 PM

well today after running good for 30 minutes it started doing its bucking and dieing thing again! grr.

IlovemybroncII · 02-15-2010, 05:44 PM

shit

**master hec0** · 02-15-2010, 08:32 PM

do the o2 sensor seriously everything sounds identical to what mine was experiencing i would fix one thing and it would seem to work good but then i would notice it about 15-30 mins after driving it.

shawn.m · 02-15-2010, 08:49 PM

about what I said =(
ran another ground from battery to frame. going to add a air/fuel ratio gauge tomorrow if I have time.
have to watch and see if the voltage meter goes to 0 also next time. doesn't seem to affect the starting circuit. so it is in the electrical or fuel circuit. Need to start reading the electrical diagrams

kimcrwbr1 · 02-15-2010, 08:53 PM

I dont know if it has been asked about the computer you say the harness was changed with the engine is the computer different also. I know it is a stupid question but sometimes things get overlooked

shawn.m · 02-15-2010, 10:48 PM

believe the computer was changed with the dash swap. the swap was done in 2000 according to BAR sticker on door. So this is a new issue.

**adsm08** · 02-15-2010, 11:00 PM

I know this is a bit off topic, but you know that those air/fuel exhaust meters are just glorified O2 sensors, right?

R+R your O2, see if it fixes anything, it really does sound exactly like an O2 sensor issue.

shawn.m · 02-15-2010, 11:24 PM

Quote:

Originally Posted by adsm08

I know this is a bit off topic, but you know that those air/fuel exhaust meters are just glorified O2 sensors, right?

R+R your O2, see if it fixes anything, it really does sound exactly like an O2 sensor issue.

well the o2 meter that Im putting on is really a glorified volt meter. it plugs into the hot signal wire and shows a graphic output of what the voltage going back to the computer is.

02-14-2010, 01:24 PM	#13
IlovemybroncII Member Join Date: Aug 2009 Location: greenville sc Year: 1990 1998 198 Make: Ford Chev For Model: BroncoII C3500 BroncoII Engine: 350/2.9/2.9 Class: 2wd/4x4/sas Used For: to hide the dollars i dont have Posts: 323 Rep Power: 8 iTrader: (0)	ok this is just another hint may or may not be problem but on my 05 f250 i would get high rpms and no power run like crap throw all kinds of codes and what it end up being was the screen on the fuel pump was so cloged up with crap would get fuel then it would not I removed screen and that was a big mistake truck would not run at all put new way too damn costly fuel pump in run like new hope this helps
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02-14-2010, 02:27 PM	#14
shawn.m Member Join Date: Feb 2010 Location: 18 miles se of placerville,ca Year: 1989 Make: Ford Model: Bronco II Engine: 4.0 Class: 4x4 Extreme Used For: search and rescue, play Posts: 188 Rep Power: 7 iTrader: (1)	remember this is a 93 4.0 with MAS air and dual O2 sensors. I have a Air/Fuel O2 meter sitting on my shelf that I think I might throw on just for fun. TPS voltage is .95 at close with a smooth trip to 4.5 -TPS and MAS sensor were both replaced. I am thinking of dropping the tank and cleaning it just to make sure that the fuel pump screen is not plugged or blocked. Has new fuel filter also. bought a fuel pressure gauge today so I can do the KOEO fuel pressure test and the running one. __________________ 1989 B2 - 1993 4.0, M50D, BW1354M, D35 4.10 LS, warn manual hubs, 8.8 4.10 LS disc brakes, 2" shackles, Xterrians 33x12.5, 6" superlift, SS lines , Optima , hatch cut off, Smitty XCR8 winch,
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02-14-2010, 08:44 PM	#15
shawn.m Member Join Date: Feb 2010 Location: 18 miles se of placerville,ca Year: 1989 Make: Ford Model: Bronco II Engine: 4.0 Class: 4x4 Extreme Used For: search and rescue, play Posts: 188 Rep Power: 7 iTrader: (1)	ran new vacuum line from EGR purge solenoid to EVAP cannister. Opened my new Fuel Pressure Gauge. Fuel pressure KOEO fuel pressure was 38psi, steady state 32PSI and goes up to 39PSI as soon as you hit the gas. So that is not the issue. Vacuum steady state is 18 in. Big thing I noticed after doing all the Grounds correctly and redoing the positive cable was that the charge voltage shot up to 16volts. Drove it around the farm again for a while charging the battery. Now the hesitation dieing is gone! Idle is now 1000 rpm and it runs great! Lots of power down to 1500rpm and up to 5500. Had all 4 wheels spinning in a mud puddle SO STOKED! : So final analysis may be that battery voltage was not where it needed to be and then the computer needed to relearn everything after proper grounding was done. next up is smog test and title transfer __________________ 1989 B2 - 1993 4.0, M50D, BW1354M, D35 4.10 LS, warn manual hubs, 8.8 4.10 LS disc brakes, 2" shackles, Xterrians 33x12.5, 6" superlift, SS lines , Optima , hatch cut off, Smitty XCR8 winch,
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02-15-2010, 05:27 PM	#16
IlovemybroncII Member Join Date: Aug 2009 Location: greenville sc Year: 1990 1998 198 Make: Ford Chev For Model: BroncoII C3500 BroncoII Engine: 350/2.9/2.9 Class: 2wd/4x4/sas Used For: to hide the dollars i dont have Posts: 323 Rep Power: 8 iTrader: (0)	yay very happy you found problem way to go
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02-15-2010, 05:41 PM	#17
shawn.m Member Join Date: Feb 2010 Location: 18 miles se of placerville,ca Year: 1989 Make: Ford Model: Bronco II Engine: 4.0 Class: 4x4 Extreme Used For: search and rescue, play Posts: 188 Rep Power: 7 iTrader: (1)	well today after running good for 30 minutes it started doing its bucking and dieing thing again! grr. __________________ 1989 B2 - 1993 4.0, M50D, BW1354M, D35 4.10 LS, warn manual hubs, 8.8 4.10 LS disc brakes, 2" shackles, Xterrians 33x12.5, 6" superlift, SS lines , Optima , hatch cut off, Smitty XCR8 winch,
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02-15-2010, 05:44 PM	#18
IlovemybroncII Member Join Date: Aug 2009 Location: greenville sc Year: 1990 1998 198 Make: Ford Chev For Model: BroncoII C3500 BroncoII Engine: 350/2.9/2.9 Class: 2wd/4x4/sas Used For: to hide the dollars i dont have Posts: 323 Rep Power: 8 iTrader: (0)	shit
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02-15-2010, 08:49 PM	#20
shawn.m Member Join Date: Feb 2010 Location: 18 miles se of placerville,ca Year: 1989 Make: Ford Model: Bronco II Engine: 4.0 Class: 4x4 Extreme Used For: search and rescue, play Posts: 188 Rep Power: 7 iTrader: (1)	about what I said =( ran another ground from battery to frame. going to add a air/fuel ratio gauge tomorrow if I have time. have to watch and see if the voltage meter goes to 0 also next time. doesn't seem to affect the starting circuit. so it is in the electrical or fuel circuit. Need to start reading the electrical diagrams __________________ 1989 B2 - 1993 4.0, M50D, BW1354M, D35 4.10 LS, warn manual hubs, 8.8 4.10 LS disc brakes, 2" shackles, Xterrians 33x12.5, 6" superlift, SS lines , Optima , hatch cut off, Smitty XCR8 winch,
	Tweet

02-15-2010, 08:53 PM	#21
kimcrwbr1 Member Join Date: Dec 2009 Location: maplevalley WA Year: 1983 Make: ford Model: ranger Engine: 2.8l Class: 2WD street Used For: DD tow boat Posts: 4,649 Rep Power: 19 iTrader: (0)	I dont know if it has been asked about the computer you say the harness was changed with the engine is the computer different also. I know it is a stupid question but sometimes things get overlooked __________________ it takes a nickle to go first class when it stops hurting it will feel alot better
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02-15-2010, 10:48 PM	#22
shawn.m Member Join Date: Feb 2010 Location: 18 miles se of placerville,ca Year: 1989 Make: Ford Model: Bronco II Engine: 4.0 Class: 4x4 Extreme Used For: search and rescue, play Posts: 188 Rep Power: 7 iTrader: (1)	believe the computer was changed with the dash swap. the swap was done in 2000 according to BAR sticker on door. So this is a new issue. __________________ 1989 B2 - 1993 4.0, M50D, BW1354M, D35 4.10 LS, warn manual hubs, 8.8 4.10 LS disc brakes, 2" shackles, Xterrians 33x12.5, 6" superlift, SS lines , Optima , hatch cut off, Smitty XCR8 winch,
	Tweet

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