97 x300 stalling while running
#1
97 x300 stalling while running
You guys have worked miracles before,I'm perplexed. 07 Vanden plas runs great yesterday while driving just cuts out like its stalling on freeway stopped at idle as the day went by it did it more and more if I hit the gas when it did it stalling would stop now it starts right up runs flawless for 30 sec then dies suddenly starts up again no hesitation dies again battery is good alternator charging scanned car codes came back for secondary air pump and pcv underperforming,I cleaned pcv 6 months ago except screen under cam cover. Oxygen sensors replaced also maf sensor and plugs. Any help you can give me will be very appreciated. Thanks in advance. Also these codes were stored before this issue.
Last edited by Mike Lore; 03-20-2019 at 03:10 PM. Reason: Omitted info
#2
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Don B (03-20-2019)
#3
Fuel injector cleaner ? Chevron brand has been recommended
If you can catch it does the Tach arrive on zero before the engine actually does ?
The CKPS can partially fail before complete failure and the fuel pump enable is one of the first aspects , it will give no codes
You can put a jumper on the fwd and aftmost sockets of the fuel pump relay to directly power the pump , with keys in pocket the relay / pump is still hot at all times
There is a TSB on the smog pump with a increase in fuse size along with a different pump # . There is a diode in the pigtail wiring . A non running smog pump will not stall the engine
If the EGR valve is binding the followup position sensor does not come to agreement of the commanded position within time . EGR should not be open at low RPM's and can be blocked off
The Inlet Air Control valve does not have this followup sensor feature and may be a open winding as the valve motor heats up
Your engine codes are on page 121 for a 97 :
http://www.jagrepair.com/images/Trai...20-%202000.pdf
If you can catch it does the Tach arrive on zero before the engine actually does ?
The CKPS can partially fail before complete failure and the fuel pump enable is one of the first aspects , it will give no codes
You can put a jumper on the fwd and aftmost sockets of the fuel pump relay to directly power the pump , with keys in pocket the relay / pump is still hot at all times
There is a TSB on the smog pump with a increase in fuse size along with a different pump # . There is a diode in the pigtail wiring . A non running smog pump will not stall the engine
If the EGR valve is binding the followup position sensor does not come to agreement of the commanded position within time . EGR should not be open at low RPM's and can be blocked off
The Inlet Air Control valve does not have this followup sensor feature and may be a open winding as the valve motor heats up
Your engine codes are on page 121 for a 97 :
http://www.jagrepair.com/images/Trai...20-%202000.pdf
Last edited by Lady Penelope; 03-20-2019 at 06:53 PM.
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Don B (03-20-2019)
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Lady Penelope (03-20-2019)
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Hi Mike,
Did you purchase fuel recently, and if so, is it possibly you got some water in the tank?
Could you please post all of the diagnostic trouble codes you scanned exactly as they appear? I know you mentioned they were flagged prior to the stalling, but we'd like to see the complete picture.
You could try swapping another relay for the fuel pump relay to see if the stalling is resolved.
If your scan tool can view Live Data, I would be interested in whether the Engine Coolant Temperature Sensor (ECTS) signal is plausible, and how the O2 sensors are behaving while the engine runs. The Short-Term and Long-Term Fuel Trims (STFT & LTFT) can also be helpful.
Cheers,
Don
Did you purchase fuel recently, and if so, is it possibly you got some water in the tank?
Could you please post all of the diagnostic trouble codes you scanned exactly as they appear? I know you mentioned they were flagged prior to the stalling, but we'd like to see the complete picture.
You could try swapping another relay for the fuel pump relay to see if the stalling is resolved.
If your scan tool can view Live Data, I would be interested in whether the Engine Coolant Temperature Sensor (ECTS) signal is plausible, and how the O2 sensors are behaving while the engine runs. The Short-Term and Long-Term Fuel Trims (STFT & LTFT) can also be helpful.
Cheers,
Don
Last edited by Don B; 03-21-2019 at 08:29 AM.
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