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-   -   Engine starts and stall in 1-2 sec (https://www.nissanversaforums.com/general-versa-discussion/42886-engine-starts-stall-1-2-sec.html)

Vrso2 05-08-2019 02:17 AM

Naaah,

TB has step motor which has to set its limits automatically by relearning process. You can do it over and over and it will do the same adjusting. Car ECU is not computer with artificial intelligence :)

I did relearn, because when i was cleaning TB, i moved fly several times ams relearning is just recommenced in this case.
Also, RPMs was running above 1000 RPM which is high idle value.

Anyway.....


I tried to start car next morning and car wont start... just for maybe half sec and dies again....

So... im back to square one....

I have one more thing i can try, buy used TB from ebay for $40 and try again...

Im lost at this moment....

amc49 05-08-2019 12:10 PM

Have fun, the computers have used AI for the last 30+ years..........they learn on the fly all day long.

Vrso2 06-08-2019 02:57 AM

Here im agaim...

Versa was doing the same thing over and over.
Every time i crank, engine starts for half a second or full second and stalls.
What i replaced so far;
Fuel pump. Crankshaft pos sensor, camshaft pos sensor (twice)
Spark plugs
Ignition coils
I replaced throttle body as well
Intake manifold ans throttle body seals

Now. Latest update.
I changed coil packs today and engin was acting the same. I cranked about 20 times and engine started running no problem. RPM went little over 1000 and when wormed up, dropped for about 700.
I test drive it with no problem. Restarted it several times and started no problem.

So, i let it sit for about hour or so and cranked again. Engine didn’t start on first crank, so I cranked again and started... i dove it arround the block and noticed check engine light was on. Using Blue driver OBD2 scanner scanned codes and p0340 pops up.
I cleared all codes and let the var sit for 3 more hours.
Than i tried to start again but no luck.
I had to crank it for about the 30 times until engine start running again.
Check engine light came back on.
Sams code. P0340...

VIN: P0340 Repair Report 3N1BC13E87L360517 DECODED: 2007 Nissan Versa (S; SL) Model Year: Make: Model: Trim Level: 2007 Nissan Versa S; SL

P0340 CODE DEFINITION: • Camshaft Position Sensor Circuit Malfunction
4 POSSIBLE CAUSES: • CMP sensor connector is damaged (check pins for damage, and for moisture) • CMP sensor has failed • CMP sensor signal circuit is open, shorted to ground or shorted to voltage • PCM has failed
TOP REPORTED FIX: • Replaced Timing Chain
2 FREQUENTLY REPORTED FIXES: • Replaced Camshaft Position (CMP) Sensor • Replaced Crankshaft Position (CKP) Sensor
4 OTHER REPORTED FIXES: • Shimmed Camshaft Position (CMP) Sensor • Repaired Camshaft Position (CMP) Sensor Wiring


Now, what surprised me is TOP REPORTED FIX - replaced timing chain ?!

Did anyone run in to this ?

Thx

amc49 06-08-2019 09:25 PM

If timing has jumped could do it. That of course will not run right, so not your issue.

If the sensor is on the cam that has variable timing it can be the mechanism for that sticking too.

Vrso2 06-08-2019 09:44 PM

Problem SOLVED !!!


I was doing more research about camshaft position sensor and found interesting solution to this problem.

I shimmed sensor about 0.7mm (0.03’’) and since then, car starts and runs like new !

I think, the problem is aftermarket sensors are not that precise manufactured.

amc49 06-10-2019 05:08 PM

Are you saying to shim the sensor FURTHER away/out/up from the lug it reads? Because that weakens the reading of it and in no way makes things better. Worse if anything.

Pointing possibly to the tightness of the connector, that time you got luckier and made better contact plugging it back up.

The sensor is a positive bottoming out type and the step there is calculated to give the best possible read of the lug. Closer = better but it cannot touch for obvious reasons.


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