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post #1 of 5 Old 05-29-2018, 12:14 AM Thread Starter
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Versa hard to start

Hi,

Versa sometimes will start, sometimes won't, normally very very sluggish to catch but cranking speed seems normal (200-225 RPM ish). Only code stored was P0335 for crank sensor, will return after a few crank attempts but did not seem to set unless the engine coughed or started. A new sensor did not change anything and the freeze frame data showed the code setting while 0 RPM. Never noted any issue when watching RPM on the scan tool. Crank sensor 3 wire connector showed 5.1 v, ground and 5.1 v. Was advised to change the cam sensor, no change. Disconnected fuel line and saw 50 PSI fuel pressure on my gauge, seemed to hold it for awhile - dead headed, did not have tee fittings. The fuel pump is only 3 months old. Checked throttle body & cleaned it up. Seems that most times the car will respond better to giving it a little gas while cranking and if you don't catch it in the first 5-6 seconds it will be even more reluctant to start. Does not seem to have much power. After sitting a few weeks it locked me out on the anti-theft and had to reset the keys. Was thinking about a voltage problem while cranking so was keeping a booster pack and a charger connected while trying to figure it out, battery is 4 years old, starter was recently replaced with a used one. Checked as many grounds and positive connections near battery and engine, did not see anything abnormal. Hopefully I'm missing something silly... Don't want to admit it but I'm stuck... help... anyone...

Thanks in advance
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post #2 of 5 Old 05-29-2018, 03:47 AM
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So, the starter replacement isnt related to our current problem(s)?

Id take the starter off and to a parts store to get tested.

When you park the car do you smell gas? Can you check to see if the fuel system holds pressure when the engine and key is off? May have a leaking injector.

All parts wear out over time and miles, but since you replaced the crank sensor its neither a bad sensor or not installed correctly.

Can you clear codes? Having a code setoff with no cranking says its a bad connection.
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post #3 of 5 Old 06-04-2018, 11:22 PM Thread Starter
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Had another look today checking for spark. When the engine would bite it had a brief spark, when the engine started it was cycling/hunting (14 times in a 9 second video) and you can see the spark (rev's up) then no spark (cuts out). When it is making spark it will jump up to an inch or so. Seemed to settle out after 1-2 minutes, maybe would have stayed running until shut off?

Is there a way to confirm the PCM is good? What does it need to make spark all the time, that I am missing.....

To answer the other questions...
starter replacement was a previous issue, not related to this one, that I'm aware.
No fuel smell at all.
Re-checked crank sensor is fully in with a mirror and re-seated the crank sensor connector, they look normal. Freeze frame data showed it set at 0 RPM... maybe its actually 0 or just a bad connection that makes it show zero...?
Been clearing codes every few attempts after cleaning up a connection or checking anything. P0335 returns every few attempts. It even started with the crank sensor disconnected... back to pulling hair tomorrow. Thanks
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post #4 of 5 Old 06-05-2018, 12:54 AM
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Does your Versa have an electronic throttle? Maybe that needs a 're-learn'?

I know at one point another site had the service manuals available for download. Might have to hunt for them, as they are very thorough in workflow diagnostics.
If you do look, you will need EC and ACC to start, but obviously get everything you can.

Last edited by Keith Wagner; 06-05-2018 at 12:59 AM.
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post #5 of 5 Old 06-08-2018, 10:06 AM Thread Starter
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After it was dead for a few weeks it idled high and when relearned it came down to normal idle speed. So yesterday I got another crank sensor from a good running engine. No change, still bucking when cold then did start. After 1-2 minutes it settled out and idled decent. Swapped back to the new crank sensor bought last few weeks. Ran it with only the cam sensor unplugged, no issue. Ran it with only the crank sensor unplugged, no issue, both times it read the RPM on scanner without missing a beat. The whole time I was pulling on, twisting and squeezing the wire harness & plugs.... again... the engine never had a miss... crank sensor code did not come back after it idled OK... (making sure the sensor is in all the way) next morning started OK... with about 1 second of cranking... this car is not the only one with this issue... looked at another Versa lately with the exact same issue, no spark when cold but will run if you crank it enough times. I hate giving up and know that someone must have been able to come up with a logical explanation for it?... thanks again for the suggestions
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