power loss when warmed up.

Rangermilitia · 09-15-2009, 03:13 AM

My ranger runs kick ass in the first initial start up untill i drive about 15 minutes. then it feels like the timing is way off and i have no pick up. everything is up to spec as far as timing goes. i have a replaced tfi module, Coolant Temp sensor, idle air controll, TPS, MAP. so now i have a break out box and want to know if anyone has a lead as to what i should look for as far the problem goes. also no codes continuios or memory....

IMenriched · 09-15-2009, 05:59 AM

Quote:

Originally Posted by Rangermilitia

My ranger runs kick ass in the first initial start up untill i drive about 15 minutes. then it feels like the timing is way off and i have no pick up. everything is up to spec as far as timing goes. i have a replaced tfi module, Coolant Temp sensor, idle air controll, TPS, MAP. so now i have a break out box and want to know if anyone has a lead as to what i should look for as far the problem goes. also no codes continuios or memory....

things to consider
how about the o2 sensor??..this should kick in after being up to temp

What about the catalytic converters....are they resent? or aged?

is spout plug back in place? (for setting base timing)

What fuel pressure after it is warm?

Zachalanche · 09-15-2009, 09:44 AM

once the engine warms up are you hearing any valve train noise? also, does the engine ever backfire when it is running like this?

robertc1024 · 09-15-2009, 12:24 PM

Does it still run ok - no missing etc? Mine acted sort of like that - turned out to be stuck caliper pistons after I drove a while and got them heated up.

Rangermilitia · 09-16-2009, 02:29 PM

o2 sensor is replaced, spout plut is in, catalytic converter is stock.. doesnt miss fire and i do hear minor valve train noise when warmed up.. and fuel pressure is good

IMenriched · 09-16-2009, 05:00 PM

Quote:

Originally Posted by Rangermilitia

o2 sensor is replaced, spout plut is in, catalytic converter is stock.. doesnt miss fire and i do hear minor valve train noise when warmed up.. and fuel pressure is good

the 1st thing that sprung to mind was that the Catalytic converter is plugged & after it gets warmed up they suffer the performance.

How new is it?? the Catalytic converter that is

it might be the compression is getting weak too.

G8RB8 · 09-17-2009, 10:15 PM

Mine is doing the same thing. I picked it up a week ago, and I've driven it probably 200 miles total since. I just put in a larger TB, 180 degree Tstat, and cleaned up the intakes and it helped a little bit, but I still have it occur after about 15-20 mins (though not nearly as drastic). Mine needs some exhaust work badly, the muffler and tailpipes are rusted, and I'm betting the cat and/or O2 sensor is going to be the culprit. I'm going to have them looked at/changed here in the next few weeks, I'll let you know if that solves it

G8RB8 · 09-17-2009, 10:17 PM

Quote:

Originally Posted by Rangermilitia

o2 sensor is replaced, spout plut is in, catalytic converter is stock.. doesnt miss fire and i do hear minor valve train noise when warmed up.. and fuel pressure is good

I hear a little valve train noise when mine warms up too, but I had a 1990 Ranger a while back that was twice as loud in the valve area, and never had a problem like this

Rangermilitia · 09-18-2009, 02:46 PM

ya i'm now thinking that i'm just going to cut out the cat.. i think thats the culprit. let me know how yours comes out

Nez · 09-18-2009, 03:23 PM

This site is great! I have just installed a Remote TFI Module on the Passenger Side Inner fender of my 90 Ranger because it ran terrible after the first 15 min or so. My sons and I had trouble finding a Heatsink so I Milled one using a Briggs & Stratton 8HP Cylinder Head. Workes Great! We have some other issues we are working on but the Truck is running stronger. Infact, I have owned it for 4 years now and it has never ran so strong.

I noticed that the TFI gets extremely hot on it's own not to mention the engine heat from the Distributer Mounting.

Today, my boys and I are going to get a spare heater blower fan which I will install on the HeatSink to keep it even cooler.

Nez · 09-18-2009, 03:24 PM

Big Jim M · 09-18-2009, 08:38 PM

That's real pretty Nez! I'm wondering why millions of others work right where Ford put em..and yours doesn't?
Big JIm

09-15-2009, 03:13 AM	#1
Rangermilitia Junior Member Join Date: Nov 2008 Location: San Ramon, Ca Year: 1987, for the m Make: Ford Model: Ranger XLT Engine: 2.9 Class: 4x4 Used For: dumping money into the drain.. Posts: 56 Rep Power: 10 iTrader: (0)	power loss when warmed up. My ranger runs kick ass in the first initial start up untill i drive about 15 minutes. then it feels like the timing is way off and i have no pick up. everything is up to spec as far as timing goes. i have a replaced tfi module, Coolant Temp sensor, idle air controll, TPS, MAP. so now i have a break out box and want to know if anyone has a lead as to what i should look for as far the problem goes. also no codes continuios or memory....
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09-15-2009, 09:44 AM	#3
Zachalanche Member Join Date: Aug 2008 Year: 1989 Make: Ford Model: Ranger Engine: 2.9 Class: 4X4 Used For: Off road / daily driver / Haulin Dirt Bikes Posts: 214 Rep Power: 10 iTrader: (0)	once the engine warms up are you hearing any valve train noise? also, does the engine ever backfire when it is running like this?
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09-15-2009, 12:24 PM	#4
robertc1024 Member Join Date: Jun 2009 Location: San Marcos, TX Year: nada Make: Ford Model: 2008 F150 Engine: 2.9 Class: 2WD Used For: teach my boys to not get rid of a Ranger. Posts: 4,850 Rep Power: 47 iTrader: (0)	Does it still run ok - no missing etc? Mine acted sort of like that - turned out to be stuck caliper pistons after I drove a while and got them heated up.
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09-16-2009, 02:29 PM	#5
Rangermilitia Junior Member Join Date: Nov 2008 Location: San Ramon, Ca Year: 1987, for the m Make: Ford Model: Ranger XLT Engine: 2.9 Class: 4x4 Used For: dumping money into the drain.. Posts: 56 Rep Power: 10 iTrader: (0)	o2 sensor is replaced, spout plut is in, catalytic converter is stock.. doesnt miss fire and i do hear minor valve train noise when warmed up.. and fuel pressure is good
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09-17-2009, 10:15 PM	#7
G8RB8 New Member Join Date: Sep 2009 Location: Greenville, SC Year: 1988 Make: Ford Model: Bronco II Engine: 2.9L V6 Class: 4x4 Posts: 24 Rep Power: 0 iTrader: (0)	Mine is doing the same thing. I picked it up a week ago, and I've driven it probably 200 miles total since. I just put in a larger TB, 180 degree Tstat, and cleaned up the intakes and it helped a little bit, but I still have it occur after about 15-20 mins (though not nearly as drastic). Mine needs some exhaust work badly, the muffler and tailpipes are rusted, and I'm betting the cat and/or O2 sensor is going to be the culprit. I'm going to have them looked at/changed here in the next few weeks, I'll let you know if that solves it
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09-18-2009, 02:46 PM	#9
Rangermilitia Junior Member Join Date: Nov 2008 Location: San Ramon, Ca Year: 1987, for the m Make: Ford Model: Ranger XLT Engine: 2.9 Class: 4x4 Used For: dumping money into the drain.. Posts: 56 Rep Power: 10 iTrader: (0)	good bye catalytics.. ya i'm now thinking that i'm just going to cut out the cat.. i think thats the culprit. let me know how yours comes out
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09-18-2009, 03:23 PM	#10
Nez New Member Join Date: Sep 2009 Location: Pennsylvania Year: 1990 Make: Ford Model: Ranger Super Cab Engine: 2.9 Class: 4x4 Used For: From Woods to Travel! and Everything in between. Posts: 8 Rep Power: 0 iTrader: (0)	TFI- Lack of Power This site is great! I have just installed a Remote TFI Module on the Passenger Side Inner fender of my 90 Ranger because it ran terrible after the first 15 min or so. My sons and I had trouble finding a Heatsink so I Milled one using a Briggs & Stratton 8HP Cylinder Head. Workes Great! We have some other issues we are working on but the Truck is running stronger. Infact, I have owned it for 4 years now and it has never ran so strong. I noticed that the TFI gets extremely hot on it's own not to mention the engine heat from the Distributer Mounting. Today, my boys and I are going to get a spare heater blower fan which I will install on the HeatSink to keep it even cooler. Last edited by Nez; 09-18-2009 at 03:25 PM. Reason: Bad Picture Upload
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09-18-2009, 03:24 PM	#11
Nez New Member Join Date: Sep 2009 Location: Pennsylvania Year: 1990 Make: Ford Model: Ranger Super Cab Engine: 2.9 Class: 4x4 Used For: From Woods to Travel! and Everything in between. Posts: 8 Rep Power: 0 iTrader: (0)
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09-18-2009, 08:38 PM	#12
Big Jim M Member Join Date: Apr 2008 Location: Austin Year: 2002 Make: Ford Model: Ranger FX-4 level 2 Engine: 4.0 Class: 4x4 Extreme Used For: DD with 31X10.50 Firestone LE's offroad with 31X10.50 MT's Posts: 2,429 Rep Power: 16 iTrader: (0)	That's real pretty Nez! I'm wondering why millions of others work right where Ford put em..and yours doesn't? Big JIm
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