North American Turbocoupe Organization



vac line on bp sensor ?'s
charles88tc Offline
Senior Member
#1
OKay so I get to the junk yard and find 2 sensors, Call my uncle and get the part # that one from an auto parts store would replace, So I get it. It was on an 89 escort. So for good measure I get one off an 87 v-6 bird too. My question is, on those cars the sensor had a vacum line attached, if Im not mistaken our cars do not. SO do I attach a vac line to it or leave it bare? Also I found an xr4ti complete engine less turbo and injectors, would that be a good core for a raplacement, for my tc, and are there any significant differences or gains from this combo? Thanks for all the help!
88 tc 5sp, Gillis, K&N on vam, Redneck cat back exaust (nothing from the cat back) 220,000 mile short block. Rebuilt 86 head and cam.
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longbedGTs Offline
Senior Member
#2
Id like to know this as well. On my Ranger, Im still using the stock Rangers MAP sensor with the vaccum line attached. Ive been told by many people that you arent supposed to have a vaccum line. Well, the proff is in the pudding. The truck runs horrible with it not attached; attach the vac line and it runs great. My motor and computer are from an 83 TC. Ive tried running a BAP from a Turbocoupe with no vac line...runs horrible.
Im very curious as to why it behaves this way.


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87 Ranger 2.3T 5spd
(2) 88 Ranger GT 2.9 5spd
88 Thunderbird Turbocoupe 2.3T 5spd
86 Daytona Turbo Z 2.2T auto trans
88 TC 5spd~money pit
88 TC 5spd~78K miles
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TurboCoupe50 Offline
Posting Freak
#3
No Vac line on the TCs.. It is used a a Baro sensor(BP) vs a MAP(manifold vaccum) on the NA cars... It's still the same part.

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1988 Turbo Coupe... Bright Red
1988 Turbo Coupe... Dk Blue(parts car)
1987 Turbo Coupe... Silver(To be sold)
1988 Turbo Coupe... White, 5.0 with Trick Flow heads
1988 Thunderbird... Lt Blue base model 5.0 Windsor Jr heads
1969 Fairlane Cobra... 428 CJ, 4 speed
1993 F150 Lightning... Black.. #249 of 5276
1993 Aerostar... (To be sold)
1993 Grand Marquis...
1988 Turbo Coupe331 AOD

1972 Comet GT

1969 Fairlane Cobra 428CJ 4-Speed
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charles88tc Offline
Senior Member
#4
Thanks turbocoupe50 I am gonna go out and get on it, then take a 45 mile test drive to my folks house to nut and bolt the whole motor. Seein since my dad had more automotive knowledge than I do, If hes not on the bottle. lol Thanks again!
88 tc 5sp, Gillis, K&N on vam, Redneck cat back exaust (nothing from the cat back) 220,000 mile short block. Rebuilt 86 head and cam.
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Jeff K Offline
Administrator
#5
BARO sensors are used on EEC IV mass air cars to measutre atmospheric pressure. MAP sensors are used on speed density cars to measure manifold vac, which is a measure of engine load.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 23 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car) // 91 Topaz (daughters first car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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charles88tc Offline
Senior Member
#6
Well finally home, (1219 a.m.) Car ran great after I put on the sensor from the 87 v-6 car, but I still got the continuous memmory 22 code, I pulled it before my 45 mile drive home, I changed plugs, swapped the autolites for motorcraft pieces. The car still has issues though, I think it may have to do with that 22 in continuous memory, as well as a code 42. IT was all it could do to get 10 psi of boost. But it ran so much smoother (dont know if thats even a word?)
Also, COuld anyone tell me about that xr4ti motor? Is the head and cam any different form the ones in our cars? I think I might get it if its still there, after a week or two at my new part time job. Thanks!
88 tc 5sp, Gillis, K&N on vam, Redneck cat back exaust (nothing from the cat back) 220,000 mile short block. Rebuilt 86 head and cam.
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charles88tc Offline
Senior Member
#7
Forgot to mention that the merkur is an 88. The intakes look different from the ones on my car. But thats actually the first one I have seen under the hood.
88 tc 5sp, Gillis, K&N on vam, Redneck cat back exaust (nothing from the cat back) 220,000 mile short block. Rebuilt 86 head and cam.
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Jeff K Offline
Administrator
#8
Did you clear the CM codes after you replaced the BARO? Even after a bad part is replaced with a good one, CM codes will not clear until 20 to 40 cold start to warm up cycles.

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Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 23 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 04 Taurus Duratec (wifes car) // 91 Topaz (daughters first car)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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Thndrchckn420 Offline
Senior Member
#9
Merks have the same motor and head/cam as the Tbirds. I Think the intakes are the same as the pre 87 birds, but might be wrong. I had an 89 XR4Ti, and it didnt pull near as hard as my TC, but it wasnt intercooled and had a different comp (my 88 has the LA3). It did handle pretty darn good though with the IRS.
88 5-spd. Precision SC-50 ball bearing turbo, gillis, full 3" exhaust w/ 3- 1/2 crome tip, ported E-6, ported big exhaust valve head, ranger roller cam, Essy cam gear, K&N cone in front of the radiator, gutted upper, knife edged lower, Walbro 255HP pump, Kirban AFPR, Forge BPV, PA Performance 130 AMP Alt...
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Pete D Offline
Administrator
#10
You can erase the CM codes by disconnecting the scanner while the codes are being reported
Pete Dunham


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