Announcement

Collapse
No announcement yet.

REALLY annoying problem!

Collapse
X
Collapse
 
  • Page of 2
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
    #1

    REALLY annoying problem!

    OK folks, I want to prod the collective brain here and see if anybody has had a similar experience.

    The TC is surging until it dies.

    Basically, the off-idle throttle response has been lack-lustre, and it's been lean popping under hard acceleration in the low RPM's, but then as soon as it gets into the rev's, it pulls like a whore. SO, I did the dangerous thing and hauled out the code reader.

    TAB for both banks.
    TPS out of range
    EGR valve not opening (will clean this later, shouldn't be causing the issue).

    SO, I check the TPS voltage........ 1.56 volts! HOLY CRAP!

    So of course the car has been disregarding the TPS input.

    So, I have THREE other TPS's here, one's a stocker from the TC, the other is a known good from the TC and the other is a Mustang one.

    They all yield the exact same result.

    They test out perfect with a volt meter.

    Car fires up and idles fine.

    Car seems to try to enter closed loop. All hell breaks loose.

    It will surge up and down until it stalls.

    I have tried TWO different IAC's.

    In it's current condition with any of the known-good TPS's, it only throws the three above codes, none of which SHOULD (in theory) be causing the issue I'm experiencing.

    The ECM isn't giving me any useful info, and I hate using trial and error.

    I could force the car to run in open loop (unplug the O2's) but that's only really a band-aide solution for now..........

    Any thoughts on this lovely perplexing issue? It's gotten late, so I can't work on it tonight, so maybe with a fresh head tomorrow, I can re-approach the problem.

    I may borrow the ECM that was out of my '87 back and try it, see if it fixes it. If so, then I know my LSC ECM is FUBAR.

    Let me know what you think.

    -Chris
    1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.
    Tags: None
    #2
    Check the harness for shorts/grounding. Other than that, chack the TB and make sure its actually closing.
    Builder/Owner of Badass Panther Wagons

    Busy maintaining a fleet of Fords

    Comment

      #3
      Yeah, the TB is fine, there's no issue there.

      The harness SHOULD be fine, it has been and was from before the swap............
      1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

      Comment

        #4
        *Should* I know how that works. My plugs and filter *Should* have been fine..Cost me about 500 bucks or more and a ton of headaches- for 20 bucks worth of parts.
        Builder/Owner of Badass Panther Wagons

        Busy maintaining a fleet of Fords

        Comment

          #5
          You making sure the TPS is set correctly on the TB? They are funky on these cars and get some preload.
          Builder/Owner of Badass Panther Wagons

          Busy maintaining a fleet of Fords

          Comment

            #6
            Originally posted by mrltd
            You making sure the TPS is set correctly on the TB? They are funky on these cars and get some preload.
            I have set it at .88, .94, .98....etc and it yields the same result every time.
            1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

            Comment

              #7
              Originally posted by mrltd
              *Should* I know how that works. My plugs and filter *Should* have been fine..Cost me about 500 bucks or more and a ton of headaches- for 20 bucks worth of parts.
              I'm thinking it might be the ECM I got from the wreckers maybe? The car ran fine as a lopo.........
              1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

              Comment

                #8
                Meter out the coolant temp sensor and air charge temp sensor to make sure they're providing useful info. I "fixed" mine from doing that crap temporarily by unplugging the ACT. Stupid idle problems over 160F stopped completely. It doesn't like the fact that the ACT is not in the lower intake I think. The TAB code is ignorable and unrelated. Possible the EgR is opening but the sensor is bad and not registering it properly. Try plugging the vac hose for it to see if it changes anything. Mine has EGR problems too, but I strongly suspect a bad position sensor in my case. Mine doesn't give any codes either so you might just need to break out the meter and start checking stuff. The bright side is that there aren't many sensors to check.
                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

                Everything looks like voodoo if you don't understand how it works

                Comment

                  #9
                  Originally posted by gadget73
                  Meter out the coolant temp sensor
                  I switched out the ECT from my Mustang into it, did not remedy the problem.

                  and air charge temp sensor to make sure they're providing useful info. I "fixed" mine from doing that crap temporarily by unplugging the ACT. Stupid idle problems over 160F stopped completely. It doesn't like the fact that the ACT is not in the lower intake I think.
                  I moved mine to the lower intake when I was having my previous issue. It's no longer in the airbox. I tried two difference ACTs with no effect.

                  The TAB code is ignorable and unrelated. Possible the EgR is opening but the sensor is bad and not registering it properly. Try plugging the vac hose for it to see if it changes anything.
                  Nope, played with the vac line for the EGR, it did nothing.

                  Mine has EGR problems too, but I strongly suspect a bad position sensor in my case. Mine doesn't give any codes either so you might just need to break out the meter and start checking stuff. The bright side is that there aren't many sensors to check.
                  I got one other code when I first fired it after clearing the ECM, which was a 42, which is left bank rich, and by the looks of the tailpipe when it was fired up......... It is. I'm wondering if a fubar injector (always my luck) could be causing this maybe? It's trying to tune it out and it can't?

                  Grasping at straws now I know.
                  1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

                  Comment

                    #10
                    Leaky injector could possibly explain it. Any of the plugs darker than the others on that bank? Also, do you happen to have a spare MAP to swap in there for testing?
                    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

                    Everything looks like voodoo if you don't understand how it works

                    Comment

                      #11
                      Yep, plug #7 was a touch uglier than expected........ But not massively. I haven't pulled out #5 and #8 yet to compare, but #6 was MUCH lighter in colour. Damn it, it's going to be a whore to find a single 4-hole to replace it with if that is indeed what it is.........
                      1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

                      Comment

                        #12
                        Originally posted by gadget73
                        Leaky injector could possibly explain it. Any of the plugs darker than the others on that bank? Also, do you happen to have a spare MAP to swap in there for testing?
                        Yes, I have two MAP sensors, the one that is on there is the known-good from the Capri. The damn Lincoln is stealing all my Mustang parts!!
                        1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

                        Comment

                          #13
                          I may still have a couple 4 holers around try cleaning the thing first. All this moving has a lot of my stuff temperarly lost.
                          Scars are tatoos of the fearless

                          Comment

                            #14
                            what are these 4 holers you speak of?

                            Comment

                              #15
                              They are newer CV/GM/TC Injectors with 4 spray holes instead of the pintle.

                              The Explorer ones are an even sassier design.
                              1989 Town Car Cartier: 3G Alt. Upgrade, Mark VIII Electric Fan, Police Interceptor Suspension, 40-series Flows, loaded. HO+ Conversion: E7 heads, Cobra 1.7RR's, Explorer intake, 65mm TB, FMS "E" Camshaft, 4-hole 19lb/hr injectors, A9P ECM, 76mm C&L MAF, BBK CAI. 338,000Km, stock bottom-end.

                              Comment

                              Previous 1 2 template Next
                              Working...
                              X