My Grand marquis has an erratic idle. It is supercharged.
we changed egr as it coded and the o2 sensors. we are thinking Idle air control. Anyone have any thoughts?
My Grand marquis has an erratic idle. It is supercharged.
we changed egr as it coded and the o2 sensors. we are thinking Idle air control. Anyone have any thoughts?
IAC or vac. leak...
ALOHA
'03 A Build Date 8/02
F.I.T. #6 ***RESURRECTED***
*444 RWHP / 401 RWTQ
*10 lbs. Boost
*P1SC1 ProCharger
*SCT Tuned *SCT Big Air 2400 MAF *BAP *GT 40 Fuel Pump *Modified FPDM *SSW Headers *MMX Drive Shaft *Metco Drive Shaft Loop *Metco Control Arms *T/A Stud Girdle w/ Diff Cover *Addco Sway Bars 3,500 Stall B/C Auto. Torque Converter *J-Mod *Wilwood 13" Big Brake Kit *Brembo Drilled/Slotted Rotors (Rear) *Widened Rims w/ 295 Nitto 555 *Autometer Wide Band A/F
When I turn on my car...It returns the favor
Something in the tune ????
'98 MGM LS...sold..................... .............................. ..'03 300A...sold 6/17
Possible tune and we can't find vac leak. It ran great after the dyno tune. We made 400+ hp and ran perf. for about 500 miles. It recently started the idle issue.
In that case, it won't be the tune...
Does it run OK, while into the throttle ?...Just idle has the problem?
When you say "erratic"...Do you mean that the motor "surges" and drops in RPM's, while idling?
Need more info...
ALOHA
Last edited by Local Boy; 11-05-2008 at 06:47 PM.
'03 A Build Date 8/02
F.I.T. #6 ***RESURRECTED***
*444 RWHP / 401 RWTQ
*10 lbs. Boost
*P1SC1 ProCharger
*SCT Tuned *SCT Big Air 2400 MAF *BAP *GT 40 Fuel Pump *Modified FPDM *SSW Headers *MMX Drive Shaft *Metco Drive Shaft Loop *Metco Control Arms *T/A Stud Girdle w/ Diff Cover *Addco Sway Bars 3,500 Stall B/C Auto. Torque Converter *J-Mod *Wilwood 13" Big Brake Kit *Brembo Drilled/Slotted Rotors (Rear) *Widened Rims w/ 295 Nitto 555 *Autometer Wide Band A/F
When I turn on my car...It returns the favor
At this point in the life of your Marauder, start thinking Coils.
I have replaced two and I think a third is going already.
Pete...
2k04 BLACK Mercury Marauder 300A #810 of 3223
DOB 10/31/2003
DOP 1/2/2004
2k19 AGATE FORD Edge ST with Performance Brakes
DOB 12/11/2018
DOP 6/19/2019
Water Wetter, K&N AirCharger/Drycharger, SS Inserts,
SilverStar 9007SU, WeatherTech WeatherFlectors, Steering Wheel Badge,
AutoMeter Gauges (Oil Press, Voltmeter, and Trans Oil Temp),
ASC 840 VSS Sunroof, Kenwood KFC-C6879ie x4, COBRA Fender Badges,
Z&M Rear Control Arms, FORD GT Coil Covers,
Gorilla Lock Lugs all around, Decklid Designs Trunk Lid Liner,
SCT Xcalibrator2 (Innovative Interceptors) w/Lidio's (Alternative Automotive) Marauder 3.55 tuning,
4R75W by Fred Brown's Performance Transmission, tuned to match Lidio's tune,
DG Motorsports Carbon Fiber Radiator Cover, Zack's Badgeless Grille,
Accel 140034-8 Coil Packs, Granatelli Motorsports Coil-On-Plug wires
Even though I walk through the valley of the shadow of rice,
I will fear no turbo for displacement is with me.
Disconnect the negative battery post and reset the AL.....only takes about a minute and you should see a big improvement??
If this works you may want to have your tuner turn the AL...OFF!!
Mine doest this periodically since my AL must still be on!!!
Marauderjack
No Marauder
Be 100% sure all the connections are tight before replacing hard parts.
And yes, definitely turn adaptive learning off.
All excellent replies. The idle just cycles from about 900 rpm to almost a stall every 1-2 seconds. I have a call into my tuner. I will try the battery disconnect. I think it is in the tune because it has no balls through the midrange.
Thanks guys I will let you know what we find.
It does sound like a physical issue. I'm gonna point you toward the PCV system. It should have a check preventing boost from entering the crankcase but circulate air from one valve cover to the other in a vac state. That would explain the vac leak AND the lack of 'balls'.
Just my , FWIW...
Red's and Jack's adaptive learning suggestions are a start. If still same trouble after battery off 'reset', then go through the PCV system.
Magindat: (majin-dat) Imagine That.
2013 Ford Taurus SHO
Lemonade - living with Fruit Punch - in Blackmobile's Garage...
FIT Procharger Kit #31 - 3.7 pulley - 9 PSI
World's first BLOW THRU ProCharged Marauder - Reinhart Tuned
#1649
boi
We found water contamination in the intake. The cause may be a wet maf sensor. The fiter placement makes it vulnerable to water contamination. The filter was soaked.We checked pcv system nothing obvious there. We dried everything out and we are putting it back together now.
Not good.
There are 2 members here that have nuked engines because the filter was behind the bumper and took on water, causing hydrolock.
Put a pre-filter on that thing ASAP.
Wet parts not the problem. Anyone had a intake manifold crack? It has been said that this can happen. Thats where we are looking now. We did get a lean code on the o2s
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