how do I tune up the 3.1 L motor?

50

Asked by Apr 14, 2012 at 05:18 PM about the 1995 Pontiac Grand Prix 2 Dr SE Coupe

Question type: Maintenance & Repair

the motor is running like it has a miss in it and is lacking power

6 Answers

93,755

Check out http://www.gaownersclub.com The Grand Am used the 3100 & 3400 motor. They have knowledgeable people and DIY instructions.

1 out of 1 people think this is helpful.
6,715

i did a sparkplug / wire change/ ignition module & coil change to get the engine smoother. have you changed the fuel filter? that might help the lack of power.

1 out of 1 people think this is helpful.
15

PROBABLY ONE OF THE THREE COILPACKS IS NOT WORKING

1 out of 1 people think this is helpful.

the best why is to change the spark plugs , air filter , fuel filter, ignition wires & pcv.if it still has a miss check your vacuum lines and o2 sensors.

1 out of 1 people think this is helpful.
12,475

Do a vacuum check. Here is a guide to help trouble-shoot. Here is a good reference for vacuum trouble shooting.......... You should get between 17-22 in. hg. at idle, depending on your elevation above 2000 feet MSL or mean sea level. To perform this test hook vacuum gauge directly to manifold vacuum. 1. Low steady needle usually indicates leaky intake, a leaky vacuum hose, late timing, or incorrect camshaft timing. 2. If reading is 3-8 inches low and fluctuates at that low reading suspect an intake manifold gasket leak at intake port or faulty injector. 3. If the needle has regular drops of about 2-4 in hg. at a steady rate the valves are probably leaking. (Perform a compression check). 4. An irregular drop or down flick of the needle can be caused by a sticking valve or an ignition misfire. 5. A rapid vibration of about four in hg. indicates worn valve guides. 6. Slight fluctuation of one inch or so indicates ignition problems. 7. Large fluctuation perform a compression check. 8. If needle moves slowly through a wide range check for PCV issues. Hope this gives you a good place to start and helps you figure it out.

2 out of 2 people think this is helpful.
535

also clean out your throttle body. Use some carb cleaner and some large pipe cleaners to get all of the carbon build up off of the throttle plate then put some injector cleaner in your fuel tank. this makes a big difference. good luck

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 3,713 nationwide Grand Prix listings starting at $1,100.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 3,980
#2 Tom Demyan
Tom Demyan
Reputation 2,670
#3 munron
munron
Reputation 2,070
View All

Related Models For Sale

Used Chevrolet Impala
795 Great Deals out of 34,381 listings starting at $799
Used Pontiac Bonneville
5 Great Deals out of 654 listings starting at $1,599
Used Chevrolet Monte Carlo
15 Great Deals out of 1,662 listings starting at $2,000
Used Pontiac Grand Am
1,646 listings starting at $1,995
Used Ford Mustang
362 Great Deals out of 44,353 listings starting at $1,000
Used Chevrolet Camaro
282 Great Deals out of 38,308 listings starting at $1,250
Used Nissan Maxima
345 Great Deals out of 25,216 listings starting at $1,400
Used Honda Accord
812 Great Deals out of 81,598 listings starting at $899
Used Nissan Altima
1,085 Great Deals out of 82,542 listings starting at $670

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
13 Great Deals out of 462 listings starting at $1,200
2007 Pontiac Grand Prix For Sale
5 Great Deals out of 542 listings starting at $3,250
2006 Pontiac Grand Prix For Sale
8 Great Deals out of 605 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
451 listings starting at $5,900