Stumped! 1997 Pontiac Grand am Lopes at idle.

Asked by Jan 31, 2012 at 05:54 PM about the 1997 Pontiac Grand Am 4 Dr SE Sedan

Question type: Maintenance & Repair

I have a 1997 pontiac grand am that I am trying to fix for a friend. Started out with a coolent leak. Replaced inake gaskets but, that was not the problem. Turned out to be timing cover gasket. Just got it all back together and now it Lopes at idle. If you rev it, it goes away. I have an equus 3160 and I plugged it in and got code po300. Random cylinder misfire. When you look at the freeze frame data it looks ok (not that I understand what I'm looking at) but, the RPM said it was 1711 rpm. I then did the live data and the RPM said the same thing plus it didn't move when I reved the engine. I'm thinking the crank position sensor but, I'd like someone elses thoughts before I do it. I have also replaced the cam position sensor as the wires were skinned. Any help would be appreciated.

2 Answers

I FOUND IT! Turns out that the Haynes manual tells you to torque the air plenum to 18 in/lbs. It's not enough. Re torqued mine to 35 and problem went away! Life it good!

5

My '97 was doing the same thing but when I took mine to the shop they replaced 2 coils, a couple spark plugs and some bad wires and she was running better than I have ever seen her.

Your Answer

Add photo

Related Questions

Search Pontiac Grand Am Questions

Pontiac Grand Am Experts

#1 tenspeed
tenspeed
Reputation 7,570
#2 John Saffrahn
John Saffrahn
Reputation 1,590
#3 Tom Demyan
Tom Demyan
Reputation 1,410
View All

Related Models For Sale

Used Pontiac Grand Prix
21 Great Deals out of 2,860 listings starting at $1,995
Used Pontiac Firebird
8 Great Deals out of 741 listings starting at $1,800
Used Ford Mustang
361 Great Deals out of 46,839 listings starting at $1,999
Used Chevrolet Impala
513 Great Deals out of 29,110 listings starting at $1,100
Used Honda Accord
717 Great Deals out of 87,014 listings starting at $1,250
Used Chevrolet Malibu
826 Great Deals out of 81,054 listings starting at $995
Used Chevrolet Camaro
154 Great Deals out of 32,676 listings starting at $1,995
Used Toyota Camry
834 Great Deals out of 89,150 listings starting at $950
Used Nissan Altima
846 Great Deals out of 78,726 listings starting at $1,677
Used Pontiac Bonneville
536 listings starting at $3,699
Used Chevrolet Monte Carlo
13 Great Deals out of 1,396 listings starting at $1,995

Used Cars For Sale

2004 Pontiac Grand Am For Sale
325 listings starting at $1,995
2002 Pontiac Grand Am For Sale
139 listings starting at $1,595