1997 Nissan Sentra stalling

Mikerizer

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#1
1997 Nissan Sentra 1.6L, 212,000 miles

Previous post from January 2008: http://www.batauto.com/Forums/index.php?topic=5073.0;highlight=sentra

It turns out the engine had jumped time. The tensioners were worn all the way through the plastic, and the chain was rubbing on the metal backing on the tensioners.

I worked on this car from February to early June, as time would permit (and my sore, aching back...). Anyway, I replaced the timing chains, tensioners, and gears...the head had to be removed. to do it. :mad:

I got it back together and cranked in early June. However, I still have some lingering problems. It seems that as soon as the engine warms up, it dies...I was trying to set the timing, and just as it warmed up, the engine stalled so suddenly it was like I turned the key off. No sputtering or anything. It was very difficult to restart, and I eventually ran the battery down.

The following codes were set:

P0100 MAF or VAF circuit malfunction
P0115 Engine Coolant Temp circuit malfunction
P0115 Engine Coolant Temp circuit malfunction
P0125 Closed loop fuel control insufficient coolant temperature

I cleared the codes; the P0115 is still showing up.

What do I need to look for?
 
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#2
Have you checked the coolant temp sensor?....Make sure it is ok....Here is part of a TSB about hard starting and no-start that might help you......Jim...........
Service Procedure
Notes

1. Connect CONSULT. If the vehicle you are working with is not CONSULT compatible, connect a tachometer (digital readout if possible).

2. Start the engine (the accelerator may have to be opened and/or the fuel pump fuse removed during cranking to get the engine to start), and warm it to operating temperature.

Note :
If the engine will not start after performing the above procedure, clean and dry the spark plugs, and attempt to start the engine again.

3. Run the engine at 2000 rpm (no load) for two minutes. Then shut the engine off.

4. Check the oil level and correct if necessary (between the "L" and "H" marks on the dipstick). If the oil level is overfull and has a gasoline odor, change the oil and filter before performing this procedure. If the crankcase is overfull with oil, idle speed adjustment may be affected.

5. Disconnect the throttle position sensor (TPS) connector. Now re-start the engine.

Note :
When the engine is in this condition (TPS disconnected), the IACV-AAC valve and the ignition timing are held in a "fixed" position, and the idle speed is called "base idle." If the engine stalls with the TPS disconnected, the base idle speed is adjusted too low. Temporarily increase the base idle speed by turning the adjusting screw on the IACV-AAC valve until the engine will idle.

Note :
On 1989-1994 Maxima's (J30) with VG30E engine the IACV-AAC valve is a "stepper motor" type valve. To set base idle on these vehicles, set the ECCS ECM mode screw fully "clockwise". This will close the IACV-AAC valve completely to allow base idle speed adjustment. Return the ECCS ECM mode screw fully counter-clockwise after setting the base idle (see step 9).

6. Rev the engine 2-3 times to 2000-3000 rpm, then allow it to idle (all accessories "off").

7. Check the ignition timing with a timing light and adjust it to specification (if necessary).
 

Mikerizer

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#3
Thanks; I'll take a look at that. Can you tell me exactly where the coolant temp sensor is located? I imagine it screws directly into the block, or maybe the intake...I don't recall seeing it on the block, though, when I had the head off. All I recall seeing is the knock sensor.
 

Mikerizer

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#4
Well, this one's back to keeping the roads of Rankin County hot...

The culprit was the temp coolant sensor, along with a gunked up throttle body. The car's running fine now.

Thanks, BAT!