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88 Branco two

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Old Nov 14, 2020 | 01:21 PM
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88 Branco two

I have a 98 Branco to with a 2.9 in it keep blowing rear main seal and looses power but then regains it going up hills any idea what’s wrong with it? And should I just get a new motor if so what the biggest motor I can drop in and go
 
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Old Nov 15, 2020 | 06:50 AM
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Originally Posted by Kev802
I have a 98 Branco to with a 2.9 in it keep blowing rear main seal and looses power but then regains it going up hills any idea what’s wrong with it? And should I just get a new motor if so what the biggest motor I can drop in and go
don’t know why it would be blowing rear main seals constantly? I do know the 2.9 is gutless and gets terrible MPG. You can fit a 5.0 in there, search the inter webs and you’ll find some information.
 
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Old Nov 22, 2020 | 09:40 AM
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Could the PCV valve be plugged? Hopefully nothing as severe as worn thrust bearings or crank sealing surface.
 
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Old Nov 23, 2020 | 06:55 AM
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Originally Posted by kelevra
Could the PCV valve be plugged?
That is a possibility. Allowing the crankcase to pressurize can cause leaks.

Engine loses power and then regains. It sounds like you need to do some diagnostic testing. KOEO test for codes, check fuel pressure, etc....

The 2.9L had average horsepower for the late 80’s. I get upper teen mpg which is better than some new vehicles.
 
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Old Nov 23, 2020 | 07:41 AM
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My brother had a 1990 Ranger with 2.9 that would blow oil from the PCV onto the hood but it ran great otherwise. It only had 100k miles on it or so.. I had a 1992 Ranger with 2.9 and over 200k miles and 5spd. I beat the snot out of it ($600 rusty truck ) and it did the same thing eventually... Decent engine but for sure I think they have an issue with crankcase pressure..

If it's a clean truck, I'd put a 5.0L or an LS in it. Either way it needs everything including an 8.8" rear to hold the power
 
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