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 juice511 Feb 14, 2013 at 07:48 AM about the 1991 Chevrolet Lumina

Question type: Maintenance & Repair

2 Answers

90V6RedHotLuminaEuro
835

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
835

wiring harness rerouted...

Your Answer

Add photo

Related Questions

Search Chevrolet Lumina Questions

Chevrolet Lumina Experts

#1 John Saffrahn
John Saffrahn
Reputation 740
#2 90V6RedHotLuminaEuro
90V6RedHotLuminaEuro
Reputation 710
#3 11jonny11
11jonny11
Reputation 570
View All

Related Models For Sale

Used Chevrolet Camaro"
582 Great Deals out of 33,001 listings starting at $1,795
Used Nissan Maxima"
585 Great Deals out of 20,843 listings starting at $1,392
Used Chevrolet Suburban"
692 Great Deals out of 19,698 listings starting at $2,200
Used Honda Civic"
1,007 Great Deals out of 61,825 listings starting at $1,288
Used Chevrolet Cavalier"
15 Great Deals out of 1,919 listings starting at $1,495