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no spark on 2002 To...
 
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no spark on 2002 Toyota Camry

  

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2002 camry, 264k miles, 3.0 v6, automatic trans. Got from a guy at work straight up guy, he bought new has had check engine light he said has been on for a long time and has code p1135 oxygen sensor upper air stream. He filled up the tank right before we came to get it. It ran great on test drive,wife was on the way home and it died. By the time i got there it started right up, took off bout 1/4 mile died again and wouldnt start. In about five minutes it started back up and same thing all the way home for 20 miles. It bucked on her once rest of time it just shut down, so figured fuel filter or bad gas with water from station. put in new in tank filter canister unit ,denso fuel pump kept old regulator. Ran it about 20 min in driveway and it died same thing no start for about 5 min. To say I was ticked off is an understatement, got my code reader and with it running again in read mode I only got the p1135 even after dying again. Had her crank it and could her fuel pump working, so pulled coil and installed an extra plug to check for spark. By that time it started again and had spark, after 13 min this time it died and I pulled the coil and installed my plug and no spark. Eureka!!!! finally had a symptom,after about 5 minutes it started back up and still had my test plug and it was sparking like crazy. Tapped on the cam sensor and tried that no start, also unplugged maf sensor no start. Not sure what to check any advise? Have had run times of 20 min then when i thought it was fuel related, changed pump relay still nostart, then after 5 min or so it started and died within 6 min, then ran for 22 then 13 then 22. Thanks kind of scratching my head, first toyota,maybe my last. 


3 Answers
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You've diagnosed the reason for this "Stalling & No re-Start" as a NO SPARK condition so stick with troubleshooting that.

It's possible you're dealing with a failing crankshaft position sensor.

You have a 2 wire VRS (Variable Reluctance crank Sensor.) It creates its own (AC) voltage instead of relying on a power and ground input like a 3 wire Hall Effect crankshaft position sensor (DC).

Both types of sensors can stop producing a signal when they get hot when they're failing. Then they'll start producing a signal again when they cool off a little.

Even when functioning correctly a VRS sensor produces a "weaker" signal than a Hall Effect sensor especially at lower rpms. So if the sensor is failing and causing a stall, it's possible its signal (when hot) is too weak to be seen by the computer during (low rpm) cranking.

Maybe hook up your scanner again and switch to Live Data.

On the 1st start of the day when you know the Camry is going to start up observe the RPMs during cranking. Make a note of it.

Let the Camry idle until it dies.

Then during the "NO re-Start" observe the Engine RPM value as you crank the engine.

If the RPMs remain at 0 rpms (or significantly lower than when it previously started) then it's likely you have a failing crankshaft position sensor and the signal is becoming either intermittentant or dropping out completely when the sensor gets hot.

 

 


Thank you for the reply, my code reader is old and does not have this function. I got it to clear codes I kept getting on my wifes mustang. Code reader was $250 I think but it was $80 a pop at the garage to clear them so i got it. It can read for codes while car is running but just says read and then displays code if any are present.


you need to spend around $50 for a better scanner. If you click on "Tools" in the upper right corner of this page you'll see an Ancel scanner for $43


Hate to just throw parts at it, but denso crank sensor is only $40 at rock auto. Not to expensive to try, and guess if its failing it wont throw a code till its out? They also have an ignition control module, but its $326 and not cheap enough just to see if it fixes my problem. Thanks again for your time replying to my post..


Ok thanks for the tip, ill get one of those scan tools thats cheap thanks Jack.


Code reader will be here tomorrow.


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I'll bet you're real happy with that guy from work.


Lol, nothing against him. He offered to give me my money back and wanted to pay for the fuel filter. I said no, he sold it to me for $1500 and Ive bought a dirt bike and another car from him in the past. Always a straight shooter, wife really likes the car and Im gonna figure it out I hope without losing too much more hair. At least Im not chasing fuel problems and Ive seen it has no spark under the 3-5 minute time after it dies. Im just old school and dont know a thing about toyotas, but im learning.


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