2000 Camry 2.2 stumble at cold warmup
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Junior Member
Joined: Apr 2024
Posts: 11
As I mentioned before on cold winter mornings, below 40F, it get realy close to 2000, about 1980 rpm.
before pandemic I fully cleaned iac valve and put new seal on it. As after warmup rpm goes down indicating that it works fine.
what next I should check?
New spark plugs and wires, new air and fuel filter.
before pandemic I fully cleaned iac valve and put new seal on it. As after warmup rpm goes down indicating that it works fine.
what next I should check?
New spark plugs and wires, new air and fuel filter.
Super Moderator
Joined: Jan 2008
Posts: 15,179
From: PTW
Seldom does the ECU fail on this car.
You state the engine can quit as in turn off then restarts OK?
The coolant has a temp sensor that sends a signal to the ECU. Based on this signal the ICU controls the IAC valve.
Check resistance of:
Ign coils,
Resistance:
Secondary
Cold Hot
9.7–16.7 Kohm 12.4–19.6 Kohm
Resistance: Cold/Hot
Camshaft position sensor
Crankshaft position sensor
835 - 1,400 ohm
985 – 1,600 ohm
1,060 – 1,645 ohm
1,265 – 1,890 ohm
The coolant system has a temp sensor (ETC) that tells the ECU the coolant temp.
Check resistance between temp sensor Green/Black and Brown wires at 176F. Should be 0.29 - 0.354 Kohm.
You state the engine can quit as in turn off then restarts OK?
The coolant has a temp sensor that sends a signal to the ECU. Based on this signal the ICU controls the IAC valve.
Check resistance of:
Ign coils,
Resistance:
Secondary
Cold Hot
9.7–16.7 Kohm 12.4–19.6 Kohm
Resistance: Cold/Hot
Camshaft position sensor
Crankshaft position sensor
835 - 1,400 ohm
985 – 1,600 ohm
1,060 – 1,645 ohm
1,265 – 1,890 ohm
The coolant system has a temp sensor (ETC) that tells the ECU the coolant temp.
Check resistance between temp sensor Green/Black and Brown wires at 176F. Should be 0.29 - 0.354 Kohm.
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