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#4128784 - 11/26/21 12:32 PM Car Stalling when Shifting into Reverse
Parkourpotato Offline
n00b

Registered: 09/06/20
Posts: 21
Loc: Oklahoma City
Hello all, I have a 2000 CVPI with 120K miles. It drives perfectly fine besides two things.
Whenever I turn it on in the morning, or after it has sat for about half an hour after parking it, it will stall if I shift into reverse too soon. I have to wait about 5-10 seconds or give it a little gas to increase RPMs. It hasn't outright refused to drive in reverse, just takes a few tries sometimes to back out of a space. Could be related to airflow?

The other issue, is that whenever I give it gas and it downshifts/gets to higher RPMs, whenever I let off the gas or slow down it holds the gear and won't upshift sometimes. (Holds 2nd gear at 4-5 RPM for example when it should shift into 3rd) The fluid looks perfect, so I'm thinking it's related to a solenoid(s) maybe?
The car sat in a garage for 2 years undriven before I got it. I haven't had any other issues, it drives like a champ.

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#4128790 - 11/26/21 01:40 PM Re: Car Stalling when Shifting into Reverse [Re: Parkourpotato]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7848
Loc: MA
Check the IAC (Idle Air Control) valve.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

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#4128792 - 11/26/21 01:47 PM Re: Car Stalling when Shifting into Reverse [Re: Parkourpotato]
Tenevic_P71 Offline
Over the Hill

Registered: 08/27/15
Posts: 1142
Loc: US
This is a computer controlled engine. Hook up a scan tool to check for pending codes. Check fuel trims, MAF, o2 readings.
_________________________
2006 P71 119k miles, 3.55 traclock

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#4132906 - 01/14/22 11:11 AM Re: Car Stalling when Shifting into Reverse [Re: Parkourpotato]
Parkourpotato Offline
n00b

Registered: 09/06/20
Posts: 21
Loc: Oklahoma City
I'm just updating this post to say it was the O2 sensors. Replacing them fixed it entirely.

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