hi 3.1 motor starts 4 about 3 sec have replaced crank sen have fuel press no check engin light could it be knock sen how can u check knock sen

juice511
0

Asked by Feb 14, 2013 at 07:48 AM about the 1991 Chevrolet Lumina

Question type: Maintenance & Repair

2 Answers

90V6RedHotLuminaEuro
1,175

I always recommend that when someone replaces the crankshaft sensor, to replace the knock sensor as well, especially on the older cars, and it's not known if it's ever been replaced... since the knock sensor is nearby, just above the crankshaft sensor..... the connectors and wiring get rotten and fall apart just from handling them, or even hitting against them sometimes... mine did... several of them, including the knock sensor connector... had to retrofit to get going again... check your connectors and wiring good... i know it's probably ugly under there... i've got a '90... got it in august of 2011... the engine compartment was a solid block of grime... used a pressure washer, a 55 gal. drum of carb cleaner, and 3 sticks of dynamite to clean it up..... the wiring was a mess..... see if your big thick wire harness that wraps around the passenger side of the engine, top side, is being crushed by the power steering pump..... if it is... check it out..... and also, if it is being crushed, un-crush it to avoid future problems...... because after vibration, heat, time and grime work on it..... it might become an issue.....

90V6RedHotLuminaEuro
1,175

wiring harness rerouted...

Your Answer

Add photo

Related Questions

Search Chevrolet Lumina Questions

Chevrolet Lumina Experts

#1 90V6RedHotLuminaEuro
90V6RedHotLuminaEuro
Reputation 1,050
#2 Justin Hatfield
Justin Hatfield
Reputation 1,000
#3 John Saffrahn
John Saffrahn
Reputation 940
View All

Related Models For Sale

Used Honda Accord"
653 Great Deals out of 76,726 listings starting at $1,400
Used Toyota Camry"
1,124 Great Deals out of 79,191 listings starting at $700
Used Ford Mustang"
307 Great Deals out of 43,111 listings starting at $1,999
Used Chevrolet Cavalier"
1,558 listings starting at $2,495
Used Ford Taurus"
212 Great Deals out of 16,649 listings starting at $1,995
Used Chevrolet Suburban"
400 Great Deals out of 20,958 listings starting at $1,991
Used Hyundai Sonata"
745 Great Deals out of 58,140 listings starting at $1,250

Used Cars For Sale

1999 Chevrolet Lumina For Sale
54 listings starting at $4,090