Hello all Im new here and have a question. I already tried the search and could not come up with anything. I have a 83 Grand Marquis 5 liter EFI the car will stall everytime I take my foot off the gas but will run fine when I give it gas. I think the IAC valve is the problem but I cant find it. Can anyone tell me where it is or what else the problem might be. Thanks for the help.
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If it is an 83 than it is a CFI car not EFI. I dont think the CFIs use a IAC valve. 85cvhpp* is the resident CFI guy.http://secondhandracing.com/Home.aspx
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R.I.P. Jason P Harrill 6-12-06
http://www.grandmarq.net/vb/showthread.php?t=5634 -
If the car hasnt been serviced for a while Id check the EGR valve first, its probably clogged holding it open. Its supposed to be open while you drive, but you cant idle too well with it open.
I had a link to an excellent writeup on how to clean CFI EGR but it was on OldSchool's page and its down now...Pete ::::>>> resident LED addict and CFI defector LED bulb replacements
'LTD HPP' 85 Vic (my rusty baby) '06 Honda Reflex 250cc 'Baileys' 91 Vic (faded cream puff) ClifFord 'ODB' 88 P72 (SOLD) '77 LTDII (RIP)
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85HPP's most noteworthy mods: CFI to SEFI conversion w/HO upperstuff headers & flowmasters P71 airbox Towncar seats LED dash light-show center console w/5 gauge package LED 3rd brake light 3G alternator mini starter washer/coolant bottle upgrade Towncar power trunk pull underhood fuse/relay box 16" HPP wheels - police swaybars w/poly rubbers - budget Alpine driven 10 speaker stereoComment
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Thanks ill give it a try.Originally posted by 85crownHPP*Comment
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Hey its nice to see a fellow Hoosier. Im only familiar with EFI 5.0s(and not an expert by no means) but thats what my 89 & 91 both did the same thing and I was EGR issues. You get good at left foot braking though.Comment
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Where in Indiana are you? Im in Crown Point.Originally posted by fomoco01
So there is no IAC valve on a 83? That would explain why I cound not find it.Comment
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There should be a dashpot that sits against the throttle lever to push it open for high idle, but no IAC like on a newer car.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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