Question about 1990 Chevrolet Corsica

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How to diagnose my car to save time and money

My 1990 chevy corsica LT V4 2.2 wont get up to speed and wont go over 60 mph I can have the pudal to the floor and it doesnt matter also when I am driving at a steady speed it seems to kind of choke makes the car chug a little the 20 year old car only has 70,000 miles so I would asume not much has been done under the hood

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  • Chevrolet Master
  • 450 Answers

MAINTAINANCE, this is an important word ! an never assume ! tune-up is another, so begin with tune-up, spark plugs, wires, cap / rotor, fuel filter, oil filter, fresh oil, transmission filter /fluid , very important, air filter must be changed also. don't go over 45-50mph until you do all of the above dude. put some drygas in your tank, red bottle, has fuel injector cleaner in it. now get to work !!!!!!!!!!!!!!!!!1

Posted on Jan 15, 2013


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Posted on Jan 02, 2017

  • 251 Answers

SOURCE: engine power loss

Inspect Wireset Damaged, worn, or deteriorating spark plug or coil wire(s). in this list u will find a answer to ur problem Shaun 2 Inspect Spark Plug Fouled, damaged or broken spark plug(s). 3 Inspect Fuel Filter Clogged or dirty fuel filter 4 Inspect Distributor Worn, loose or incorrectly adjusted distributor. 5 Inspect Distributor Cap Loose or cracked distributor cap 6 Inspect Distributor Cap And Rotor Kit Loose, cracked, or worn distributor cap and ignition rotor. grey_line.gif 7 Inspect PCV Valve Plugged or damaged pcv valve. grey_line.gif 8 Inspect Air Filter Restricted or clogged air filter. grey_line.gif 9 Inspect Catalytic Converter Clogged, damaged, defective or faulty catalytic converter. grey_line.gif 10 Inspect Automatic Transmission Improperly adjusted kickdown cable adjustment or internal transmission problems. grey_line.gif 11 Inspect Fuel Pump Improperly functioning fuel pump or circuits. grey_line.gif 12 Inspect MAP Sensor Improperly connected or faulty m.a.p. sensor. grey_line.gif 13 Inspect Mass Air Flow Sensor Improperly connected or faulty mass air flow sensor. grey_line.gif 14 Inspect Throttle Position Sensor Faulty throttle position sensor or throttle position sensor circuit. grey_line.gif 15 Inspect Timing Specification Incorrectly adjusted engine timing. grey_line.gif 16 Inspect Fuel System Pressure Incorrect fuel pressure being delivered to carburetor or fuel injection system. grey_line.gif

Posted on Nov 15, 2008

  • 1450 Answers

SOURCE: while driving truck makes a humming sound in drive now no reverse

If you have no reverse then yes it needs to be rebuilt. as far as the whining it could be in one of the differentials. or in trans? just depends on where you hear it

Posted on Dec 08, 2008

  • 1959 Answers

SOURCE: my 1998 chevy truck has a rough idle and kind of

There could be several causes for your problem:

  1. Fouled spark plug
  2. Bad spark plug wire
  3. Clogged fuel injector (is equipt)
  4. Bad EGR valve (diagram below)


Posted on Jul 29, 2009

  • 1 Answer

SOURCE: Poor cabin cooling at idle speed. 2005 Equinox LT. 2 speed fans?

Check for debris between your cabin filter and fan motor. I had the same problem and just dropped my fan motor. What I found is I had an animal nesting in that area, probably a chipmunk. I had 6-7 fists full of grass. I cleaned it out and my fan no longer makes noise and my cool air is flowing great any RPM.
FYI, my car is always parked outside.

I hope this helps.

Posted on Sep 26, 2009

  • 16 Answers

SOURCE: My 1978 Chevy truck will choke down and die

Not sure what "choke down" means. If you mean run really rich and smoke black, like the choke is stuck, look at the choke linkage. If you mean lay down and give no power, but not smoke black and not sound farty and blubbery, that is likely not a choke problem.

Look at the fuel filter. They can be mostly clogged but pass enough fuel to get by under most situations; also their internal gunk load can shift, causing a filter that was serving okay to be clogged at a moment's notice.

Check the gas cap and the tank vent / evaporative emissions system - if air can't get in to replace the fuel you removed from the tank, pretty soon your fuel pump is trying to **** fuel out of a tank that is already under a vacuum.

If those two are OK, throw an ignition coil in it. They are cheap and easy enough, and a failing one will intermittently lay down and give weak sparks. If you can catch the truck in its failure mode, try loosening one of the plug wires (either end) and holding it a half inch away from its previous mount. You should get fat bright blue sparks jumping the gap, snapping as they fly; if they won't jump that far, or sound or look wimpy, your coil is suspect.

If you change your coil and the problem goes away, give the truck a tune-up - cap, rotor, plugs, and wires, and also change the ignition module (an extra $20 for a cheapie.) Coils don't die of old age; they die of overwork, like trying to push very high voltage through high-resistance spark plug wires and across worn-out plugs. The ignition module has to handle all of the power that goes through the coil, and if the coil is stressed, so is the module. They can fail without warning, stranding you until the module cools down enough (30 minutes to six hours) that it will run again.

Posted on Nov 16, 2009

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