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
1,005

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
1,005

wiring harness rerouted...

Your Answer

Add photo

Related Questions

Search Chevrolet Lumina Questions

Chevrolet Lumina Experts

#1 John Saffrahn
John Saffrahn
Reputation 890
#2 90V6RedHotLuminaEuro
90V6RedHotLuminaEuro
Reputation 880
#3 Justin Hatfield
Justin Hatfield
Reputation 790
View All

Related Models For Sale

Used Toyota Camry"
1,219 Great Deals out of 76,057 listings starting at $800
Used Chevrolet S-10"
38 Great Deals out of 1,598 listings starting at $899
Used Buick Century"
1,351 listings starting at $1,550
Used Honda Accord"
1,031 Great Deals out of 71,484 listings starting at $1,200
Used Buick Park Avenue"
11 Great Deals out of 581 listings starting at $2,401
Used Nissan Maxima"
346 Great Deals out of 18,258 listings starting at $1,499
Used Honda Civic"
745 Great Deals out of 58,448 listings starting at $995
Used Chevrolet Caprice"
154 listings starting at $2,495
Used Chevrolet Camaro"
467 Great Deals out of 30,556 listings starting at $2,000