Quick Questions...

[Frankenstein86]

Okay, so I have a 86' Ranger 4x4 with a cracked head and/or block (water in oil top to bottom, it's a real mess). So I decided to swap the motor out, and to keep from dealing with an onslaught of wiring issues I just went back with another 2.9 out of 1990 Bronco 2. My questions may seem somewhat random but here we go...

1) Do I need to take the EGR Valve System (including driver side exhaust manifold) off the 86' motor and put onto the 90' motor? Do I HAVE to have it to run properly?

2) On the 86' motor I have a sensor that just screws into the block under the driver side exhaust manifold, the 90' motor has no such sensor. It was easily swapped out but just for future reference can anyone tell me the formal name for this sensor? I have been told it is a knock sensor, is this correct?

3) Are the TFI Modules interchangeable between these two motors?

4) Is there anything I should know, anything that might keep me from just being able to basically plug and play....

Any help would be greatly appreciated.

 

[SenorNoob]

1) It isn't necessary per se but should cause codes and a check engine light without it. The truck should still drive fine. The EGR could be swapped on later or apparently a later ECU connects right up and "fixes" the problem.

2) That sounds right. Does it look like this?

That's what Rockauto lists for a knock senor for a '86 Ranger 2.9.

3) Here's the list of compatible vehicles for the TFI module.

FORD AEROSTAR (1986 - 1992)
FORD BRONCO (1984 - 1993)
FORD BRONCO II (1984 - 1990)
FORDE-150(1984 - 1995)
FORDE-250(1984 - 1995)
FORDE-350(1984 - 1995)
FORD ESCORT(1983 - 1989)
FORD EXP(1983 - 1988)
FORD F-150(1984 - 1995)
FORD F-250(1984 - 1995)
FORD F-350(1984 - 1995)
FORD LTD(1984 - 1986)
FORD LTD CROWN VICTORIA(1984 - 1986)
FORD MUSTANG(1983 - 1993)
FORD PROBE1992
FORD RANGER(1983 - 1992)
FORD TEMPO1984
FORD THUNDERBIRD(1983 - 1987)
LINCOLN CONTINENTAL(1984 - 1986)
LINCOLN MARK VII(1984 - 1986)
LINCOLN TOWN CAR(1984 - 1986)
MERCURY CAPRI(1982 - 1986)
MERCURY COUGAR(1984 - 1987)
MERCURY GRAND MARQUIS(1984 - 1986)
MERCURY LN7 1983
MERCURY LYNX(1983 - 1986)
MERCURY MARQUIS(1984 - 1986)
MERCURY TOPAZ 1984
MERCURY ZEPHYR 1982
MERKUR SCORPIO(1988 - 1989)
So yes they should be the same.

4) Hmm, I can't see what it would be but IDK much about the 2.9s. I went to a 4.0 pretty quickly

 

[raggadie]

I did the same thing to my truck. Because I didn't want any codes, I just put a new computer in. It runs fine with the EGR plugged and the knock sensor taken out. You could more than likely use the same computer you have without timing issues. From my understanding, the knock sensor retards the timing, so without one and the truck pulling a code, I don't think it would retard. Then again, if you are like me, you would want to look into this.

Lastly, I would look into moving the TFI to a cooler location.

Ross

 

[Frankenstein86]

I already swapped the EGR system, not too bad. The knock sensor simple swap, and how would I go about relocating the TFI. I'll be dropping the new motor in tonight hopefully.

 

[Frankenstein86]

Also thank you guys for the info in case anything else were to go wrong.