Question about Cars & Trucks

2 Answers

2000 chevy blazer crank no start. I was told it overheated and has been parked ever since. (one year). I replaced cap, rotor, plugs and wires. wont start and only one code P0122. please help

When it cranks over it sounds like a prius and not like a 4.3 vortec...??

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    Visited the website for 3 consecutive days.


    An expert whose answer got voted for 20 times.

  • Expert
  • 146 Answers

P0122 is throttle position sensor out of limits low voltage.

Posted on May 16, 2017

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 4,528 Answers

I'm not sure about a Prius? If cranking rpms sound faster than normal, you need to check compression.
You may need fresh fuel? After it sat that long I may have pulled the plugs and tried the crankshaft by hand, plus add few drops of oil in each cylinder, before cranking.
I saw what you replaced, what testing have you done? Did you visually check for spark at the plugs, engine cranking. Key on engine off, did you use a gage and check proper fuel pressure, with the spider fuel system, 60--66 psi. After it is started it may run with about 10 psi less. Engine cranking you have fuel injector pulse?
The code is for throttle position sensor. Three wire connector, 5 volt ref--ground--signal. You can use digital multimeter to check signal wire, just turn on the key, move throttle by hand, watch the voltage, closed throttle .36--.96 voltage, wot 4.0 min. Voltage should move up and down smoothly.

Posted on May 16, 2017

  • jessie May 16, 2017

    Yes I have spark. I also spayed starting fluid in throttle body and nothing. I'm getting fuel at the intake so pump is good. Obd throws one code p0122. So I replaced TPS, still nothing and same code. Today I will chk compression and fuel pressure. Thank u much

  • jack layton
    jack layton May 17, 2017

    Just because you have fuel, doesn't mean the pressure is good. With the spider fuel system, the key on engine off fuel pressure can be critical. This system is noted for problems.
    As far as the tps, check wiring circuits.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

My 2000 chevy blazer will file but wont start sometimes

not knowing the condition of you suv, replace fuel & air filters, very important, replace distributor cap & rotor, spark plugs & plug wires. that should do it, good luck

Mar 10, 2013 | 2000 Chevrolet Blazer

1 Answer

1999 chevy blazer not starting

Check the plug wire from the ignition coil to the distributor cap.
If you haven't already, replace the distributor cap and rotor.
The GM Vortec's have issues with moisture getting inside the cap and rotor and causing problems.

Apr 24, 2012 | 1999 Chevrolet Blazer

1 Answer

Replacing rotor cap for 2004 chevy trail blazer

ya go to a mech, if you strips the srews on the cap (and rotor), youll be sry. I have a blazer for 10 years and find that they must be changed yearly. Buy a GOOD set of plug wires and GOOD spark plugs, they are a real tought time to replace.

Mar 08, 2011 | 2004 Chevrolet Blazer

1 Answer

Did a tune up on a 2002 chevy blazer. plugs wires cap & rotor. i didnt realize the new hold down bolts for the cap were taped to the insideso when i started itthe rotor and cap got damaged so i...

Hi, take you a rachect and socket put on crank bolt and turn till your mark on crank pullly id TDC. That should put you on number 1 cyclinder look at rotor cap were #1 is and see if they match. But if you didnt pull distributor the timing should not be off at all. have you checked out every thing eles in distributor cap if it damge cap and rotor could have messed up pick up coil or ignition module.If i can help just re post.

Jan 08, 2011 | 2000 Chevrolet Blazer

1 Answer

Blazer wont start

You are getting good spark to the plugs? Have to assume you retimed it after you changed the rotor and cap. Wires are good?

Could be the ignition module, but they usually are either good or bad and not itermittent(sp)...

If it trying but just not 'catching'.. seems like a timing issue, or possibly the coil (although coils tend to be good or bad as well)

Mar 06, 2010 | 2000 Chevrolet Blazer

1 Answer

2000 blazer turns over wont crank

you coul remove the # 1 plug wire (1st on drivers side) and see if your getting a spark. It may need a new distributer cap and rotor.or it just may need new spark plugs. fair warnig I am not a mechanic but have had similar problems like this that I have had to fix myself.

Mar 27, 2009 | 2000 Chevrolet Blazer

3 Answers

Vehicle just keeps cranking wont start.

Make sure that your fuel presure is up to at least 60 psi if not that could be your problem. If not, make sure you are getting spark, if not could be your Crank sensor or ingniton module ECM. Usually if your Engine control module wouldn't be bad because of your fuel pump is working, but may not be putting out the proper pressure for the fuel system. Fuel Pumps are a Problem with that year..

Jun 08, 2008 | 2000 Chevrolet Blazer

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

26 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts


Level 3 Expert

78289 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Thomas Perkins
Thomas Perkins

Level 3 Expert

14405 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides