fast idle at start up then small miss

amfam · 05-02-2008, 06:01 PM

Hi my 87 GN has a fast idle at start up 2500 rpm. then after warm up goes to normal, but has little of a miss. When car is running 45-50 mph at trans lock up it has a small miss. The miss is not noticiably when excelrating or under boost. any help would be great

ULYCYC · 05-02-2008, 06:51 PM

Post your scantool readings at idle.

amfam · 05-02-2008, 07:02 PM

I wish I could, no scanmaster.

ULYCYC · 05-02-2008, 07:05 PM

I suggest you get one

05-02-2008, 06:01 PM	#1 (permalink)
amfam Registered User Join Date: Apr 2008 Posts: 7	fast idle at start up then small miss Hi my 87 GN has a fast idle at start up 2500 rpm. then after warm up goes to normal, but has little of a miss. When car is running 45-50 mph at trans lock up it has a small miss. The miss is not noticiably when excelrating or under boost. any help would be great

05-02-2008, 06:51 PM	#2 (permalink)
ULYCYC Fuhgeddaboudit Join Date: Sep 2000 Location: Brooklyn, NY Posts: 16,721	Post your scantool readings at idle. __________________ ED BAKER 87-T, Maplight equipped rear view mirror.. 93 PARK AVE"SUPERCHARGED" BPG#1458 My Photo Page buickperformancegroup.com "As democracy is perfected, the office of President represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."---H.L. Mencken 1927

05-02-2008, 07:05 PM	#4 (permalink)
ULYCYC Fuhgeddaboudit Join Date: Sep 2000 Location: Brooklyn, NY Posts: 16,721	I suggest you get one __________________ ED BAKER 87-T, Maplight equipped rear view mirror.. 93 PARK AVE"SUPERCHARGED" BPG#1458 My Photo Page buickperformancegroup.com "As democracy is perfected, the office of President represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."---H.L. Mencken 1927

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05-02-2008, 07:02 PM	#3 (permalink)
amfam Registered User Join Date: Apr 2008 Posts: 7	I wish I could, no scanmaster.