My '92 Lumina 3.1 with 163K miles has an intermittant "Service Engine Soon" light that comes on and off every few minutes while driving. The codes come up MAP sensor and knock sensor...what gives?

Asked by Aug 08, 2014 at 02:46 PM about the 1992 Chevrolet Lumina 2 Dr STD Coupe

Question type: Maintenance & Repair

Before I start replacing expensive sensors, I'd like tp know why my Lumina idiot light comes on and after a few minutes turns off while driving. It feels like for the few minutes it is on the engine does run rougher but then goes back to normal when the light goes off.
Also, the engine drips oil and leaves stains everywhere I park it...is there any effective aftermarket stuff I can add to the motot oil to at least slow down the drips? I thiink it's the rear main seal that's worn.

1 Answer

455

Ideally you should locate the source of the drip. If you have a leaky gasket somewhere then you should remove it, clean the surface, verify that the metal has not been scored or warped, place a new gasket and sealant, and torque to specifications. If the leak is around the valve covers or the oil pan then the repair is fairly easy. If the leak is around the heads or manifold then the work is a bit more tedious and more gaskets are needed. You can easily test a knock sensor using an ohm meter. You should verify that the vacuum line on the MAP does not have a pin hole or leak anywhere. You can test the MAP with an ohm meter as well. If the vacuum line is in question then you can rent a small pump to apply pressure at the vacuum hose connection for testing purposes.

Your Answer

Add photo

Related Questions

Search Chevrolet Lumina Questions

Chevrolet Lumina Experts

#1 90V6RedHotLuminaEuro
90V6RedHotLuminaEuro
Reputation 1,180
#2 John Saffrahn
John Saffrahn
Reputation 1,060
#3 11jonny11
11jonny11
Reputation 910
View All

Related Models For Sale

Used Ford Taurus
262 Great Deals out of 19,091 listings starting at $1,499
Used Honda Accord
1,046 Great Deals out of 68,867 listings starting at $1,000
Used Toyota Camry
1,219 Great Deals out of 84,969 listings starting at $750
Used Pontiac Grand Prix
27 Great Deals out of 2,823 listings starting at $1,991
Used Nissan Maxima
328 Great Deals out of 24,436 listings starting at $1,995
Used Chevrolet Camaro
349 Great Deals out of 31,370 listings starting at $2,500
Used Lincoln Town Car
28 Great Deals out of 1,791 listings starting at $1,495
Used Chevrolet Cavalier
3 Great Deals out of 992 listings starting at $695
Used Ford Mustang
716 Great Deals out of 44,997 listings starting at $1,500
Used Buick Century
852 listings starting at $1,850

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.