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Topic: Idle surge...problem still not solved (Read 5027 times) previous topic - next topic

Idle surge...problem still not solved

Reply #15 –
Well, the car is fine cold...as it was before.  Once it starts to warm up, it will idle nicely for about a minute or so, then comes the surging, as it was before.  I hate this friggin' thing!
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Idle surge...problem still not solved

Reply #16 –
mines doing a similar thing it idles real high then almost dies then revs itself way up the tries to go back to normal but almost dies and then revs itself way up. just surging up and down. but it doesnt do it while its cold. only after it startshiznitting operating temps. I did notice that messing with the TPS did make a difference but didnt totally fix it.
87 T-bird two tone diarrhea color. 5.0 converted with AOD.  GONE BUT NOT FORGOTTEN
 
94 Lincoln Towncar, Dark Metallic Green, 4.6L AOD
SOLD!!!!
 
99 Mercury Cougar. V6 MTX75 Trans. CURRENT PROJECT DAILY DRIVER.

Idle surge...problem still not solved

Reply #17 –
Quote from: Master_xzavior
how do you adjust the TPS?


it use to be that the mounting holes in a tps were egg shaped.  You could then loosen the screws and rotate it ccw or cw.  Nowadays, it seems the tps holes are just plain jane round.
my remedy is to use a round file and egg the holes out and remount the tps.  now i can tweek the tps and measure off the green wire to get below a volt.
 

Idle surge...problem still not solved

Reply #18 –
yeah I got the eggshaped my problem is figuring out how to read volts on my multimeter
87 T-bird two tone diarrhea color. 5.0 converted with AOD.  GONE BUT NOT FORGOTTEN
 
94 Lincoln Towncar, Dark Metallic Green, 4.6L AOD
SOLD!!!!
 
99 Mercury Cougar. V6 MTX75 Trans. CURRENT PROJECT DAILY DRIVER.

Idle surge...problem still not solved

Reply #19 –
You guys seem to have the oppisite problem that I had... When cold(under 55*) mine surged badly and always died unless I kept on the throttle. That problem has mostly been eleminated with the switch to the A9L EEC...

Ronnie had some problems such as you are describing(mass air A9P EEC) and found the A/F ratio was varing from around 13 to over 17 to 1 when hot. After trying everything, replacing the EEC fixed it...

I don't want to say thats your problen, but if you can find one to try it may be worth the effort... The Lincoln EEC does have the cruse amplifier in the computer. IF that circuit is connected, there can be some odd happnings... Be sure pins 35, 38, and 41 are not connected to some other circuit...

Idle surge...problem still not solved

Reply #20 –
You guys seem to have the oppisite problem that I had... When cold(under 55*) mine surged badly and always died unless I kept on the throttle. That problem has mostly been eleminated with the switch to the A9L EEC...

Ronnie had some problems such as you are describing(mass air A9P EEC) and found the A/F ratio was varing from around 13 to over 17 to 1 when hot. After trying everything, replacing the EEC fixed it...

I don't want to say thats your problen, but if you can find one to try it may be worth the effort... The Lincoln EEC does have the cruse amplifier in the computer. IF that circuit is connected, there can be some odd happnings... Be sure pins 35, 38, and 41 are not connected to some other circuit...

Idle surge...problem still not solved

Reply #21 –
Okay, thanks.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Idle surge...problem still not solved

Reply #22 –
Here's my idea for you:

More than 5 years ago, we found that our '88 Bird was surging both while at idle and also on the road.  It was sporadic---would even roar at a stop...    The local Ford place told us they could not identify the problem ($70 for nothing).  We then went to a small specialty shop.  Right off, he did a clean job of the injectors at the fuel rail (attached the appartus at the fuel rail).  Problem solved.  I believe the problem happens when an injector starts sputtering or mal behaving and thus the engine computer attempts to over correct that, causing the surge or otherwise.  I will not put any cleaner in the gas tank because, in retrospect, I have done this preventive maintenance in the past--maybe causing this problem to happen?  You would be amazed at the  that builds up in the bottom of a fuel tank.  Now, in five years+ since, the problem has not returned even though the shop guy told us that this is a common problem with older injector engines.  I had this happen in my Ford 5.0 shortly after the TB--diagnosis.  I have not used injector cleaning in the tanks since the TB problem--no problem since.  Have you put any cleaners in your tank recently in the past?

Idle surge...problem still not solved

Reply #23 –
Mine has just been swapped in so any cleaners I used in the past shouldn't be an issue on mine. But then I don't know if the person who had them before did. Anymore I don't use any cleaners or such other then Lucas Oil products. The reputation they have it shouldn't cause any problems
87 T-bird two tone diarrhea color. 5.0 converted with AOD.  GONE BUT NOT FORGOTTEN
 
94 Lincoln Towncar, Dark Metallic Green, 4.6L AOD
SOLD!!!!
 
99 Mercury Cougar. V6 MTX75 Trans. CURRENT PROJECT DAILY DRIVER.

Idle surge...problem still not solved

Reply #24 –
Yes I used some fuel additives, but I had the problem for quite some time and I already replaced the injectors...didn't help the surging.  I was doing some driving last night just for the sake of it...I would say that 50% of the time that I was stopped at a light for an extended period of time, it was idling nicely at 600rpm in gear.  Seems like when I ignored what the car was doing and paying attention to the conversation me and my friend were having it would be good...if I was watching the tach...it would surge...lol, car must have a mind of it's own.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Idle surge...problem still not solved

Reply #25 –
Ok, a little more info that might or might not help.  While driving today...it seemed to be idling nicely at 600rpm in gear at a stop after driving above 40 or so mph...if I let my foot off of the brake and let it roll forward a bit then stop...it would act up...if i popped it into neutral and revved it a little then popped it back into gear, it seemed to calm back down.  It's a weird situation and I'm just trying to relay all the facts...wondering if my speedo being off could cause part of the problem...ECU getting a false reading from VSS?  I don't know, just publicly thinking aloud...lol.

thanks again,
Don
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Idle surge...problem still not solved

Reply #26 –
not sure it rolls over into the V8 but I changed trannys behind the 3.8 that was in my car and the speedo was off and it didnt make a difference. I would think it wouldnt make a difference. Just a thought and its probably been covered I just skimmed over what all we've covered so far. pull the codes from the computer and see what youre popping up. My light isnt on but I have something wrong with my TPS, something called AIRB messing up, and something called AIRD messing up. Basically codes 14, 81,82, the AIRB and D Im guessing is the TAB and TAD sensors which I didnt hook up due to they looked like part of the emissions system which could be part of my problem. check yours and see what you get. My light doesnt even flicker when the cars running but it still pops codes up out of the computer. The only time my light has came on the EGR vacuum hose was unhooked.
87 T-bird two tone diarrhea color. 5.0 converted with AOD.  GONE BUT NOT FORGOTTEN
 
94 Lincoln Towncar, Dark Metallic Green, 4.6L AOD
SOLD!!!!
 
99 Mercury Cougar. V6 MTX75 Trans. CURRENT PROJECT DAILY DRIVER.

Idle surge...problem still not solved

Reply #27 –
What's your fuel system setup?  Injector size, pump size, adjustable regulator or stock?  Also if adjustable, whats the pressure at?
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

Idle surge...problem still not solved

Reply #28 –
My car is completely clear of codes in both KOEO and KOER modes...my fuel system consists of 19lb/hr injectors, stock FPR, stock t-bird pump, '91 Lincoln ECU...yes it is a speed density HO.

I do have a fuel press. gauge where my schrader valve used to be...it's at roughly 32lbs w/vacuum and 42 lbs w/o vacuum...needle isn't steady either, like it used to be...flickers around within 2-3lbs all the time that I know of....that leads me to believe maybe a FPR or pump has seen better days...don't know.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

Idle surge...problem still not solved

Reply #29 –
Set the F/P to 39psi with the ign on and engine off. You can do this by grounding the tan/green wire on the EEC test plug. A lot of gages tend to fluctuate, I had the same problem with my first gage. It finally wore it's self out with all the jittering...