The MCU doesn't do much. Unplug it and see if anything changes. ALl that should happen is the smog pump and egr valve won't work. I think it does somehow mess with the timing through the third plug on the Dspark box, but I'm not sure what it really does. It may have a knock sensor or something that screws with the timing.
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86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers -
I did unplug it and it didnt change anything...
New update.... car idles super low then stalls, really hard to start (have to put my foot to the floor to start it at all...)
pulsates when you try to rev it up...dies if you come down to an idle....
Car went from semi-drivable to unmoveable...
I fixed a small vacuum leak...and replaced some vacuum lines (ones coming off the manifold was actually clogged....) With all this happening i expected it to run better...not worse...I'm at a loss here...-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speedComment
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Originally posted by Brown_Muscle View PostI did unplug it and it didnt change anything...
New update.... car idles super low then stalls, really hard to start (have to put my foot to the floor to start it at all...)
pulsates when you try to rev it up...dies if you come down to an idle....
Car went from semi-drivable to unmoveable...
I fixed a small vacuum leak...and replaced some vacuum lines (ones coming off the manifold was actually clogged....) With all this happening i expected it to run better...not worse...I'm at a loss here... Did you find a graduated cylinder? I wanna see what's in the gas besides gas.
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Use a pickle jar or anything else thats clear. I use plastic cups from one of the waterfront bars on the boat. I have dozens of the things.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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There is a knock sensor and the MCU will pull out timing. I believe it also governs enrichment to some extent.
85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc
06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)Comment
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I don't know if its the best option, however its the cheapest and safest route....I'm going to rebuild the VV.
I messaged nathan in MI however he hasn't been on in a few days so no telling when he'll get back to me...hopefully soon...i want to make sure i dont need a special tool kit...-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speedComment
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sounds like its carb swap time. this almost sounds like what the VV was doin on my merc before it shit the bed. it would do all sorts of weird stuff like missing, stalling and flooding out. it got so bad that it wasent drivable anymore. had it swapped for a 2150, then it was all good again.
1981 Mercury Marquis Brougham 2-Door 302/ 5-speed -special blend (GMGT)
1987 Lincoln Mark VII 5-speed (Errand runner)
1989 Mercury Grand Marquis (Base Runner)
2007 Lincoln Town Car Signature Limited (Hustlyn)
2011 Ford Crown Victoria Police Interceptor (Down with O.P.P)Comment
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started it up today... when i went to give it a little gas a sound came from under the dash around the brake/gas pedal....like a sudden release of gas over rubber? Best way i can describe it is a high pitch farting sound....haha. With it came a puff of smoke that smelled burnt...not sure exactly what...could this be a possible leak of some sort??? any ideas on this?-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speedComment
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THIS, WILL ONLY LEAD TO TEARS. I hope everything works out for you. When do you plan on doing this? I want to be there.Originally posted by Brown_Muscle View PostComment
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it allready has lead to tears....haha. I will let you know.-Phil
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+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speedComment
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sounds like it backfired a little and farted out the line to the vacuum brake release actuator at the end of the steering shaft just cabin side of the firewall... but that's thinking of what might happen if it was my car and carbed. not sure about the actual carbed cars if they have that setup. Check valves may be blown to hell and back if you are having backfires.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
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carbed cars did come equipped with the same parking release vacuum stuff as SEFI cars, though an 82 police model might not having automatic parking release at all.
85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc
06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)Comment
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I kinda figured it was something of a backfire...
And i do have an auto release parking brake, cause i'm awesome-Phil
sigpic
+1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.
+2003 Acura CL Type S 6-speedComment
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A parking brake release leak isn't going to cause enough trouble to explain all of this.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousersComment
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Alright, I think I might know what the problem is. But the actual procedure to fix the problem I can't find. The diaphragm on the back of the carb, for the venturi valves may have ruptured, or will soon. This diaphragm is what allows the valves to move back and forth. From what I've heard, pressure can build back behind the diaphragm and push it in the opposite way, causing the problem that Phil's seeing on his engine right now. The fix? If the diaphragm is indeed broken, a new diaphragm would be needed (supplied in a rebuild kit), and a hole drilled. Where the hole is drilled I don't know. My teacher is working with me to help find the proper procedure of where exactly to drill the hole. What I've been told so far, that repair is something that's done during the rebuild of the VV.
A Pic of where the diaphragm is behind. Courtesy of Nate's VV Carb Rebuild.
I will have more info in the next few days, if not sooner.Originally posted by Nathan in MI View PostThis is the rear of the carburetor. The big housing right in the center is the vacuum diaphragm that controls the venturi valves (more on that later). The smaller one on the right is the vacuum diaphragm for the cold enrichment system again.
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