Can a bad alternator cause surging?
So, for the archives, a bad or dead alternator can also definately cause idle surge.
Can a bad voltage regulator cause high idle?
Could it be The voltage regulator? No. You’ve got the cause and the symptom mixed up. As did whoever wrote that humorous thing about the voltage making the idle surge.
Why does my Mitsubishi Galant engine surge at idle?
Car runs fine once she is going but at idle the engine seems to surge/buck forward when idling at a stop sign or red light.
What kind of fault does a Mitsubishi evoscan have?
Idle air control (IAC) valve position sensor fault. Rear Oxygen (O2) sesnor fault. Transaxle control module torque reduction signal fault. Variable Induction control (VIC) valve position sensor fault. Traction control (TC) vacuum valve solenoid fault.
How to do self diagnosis on a Mitsubishi evo7?
1 EFI/ABS/AYC/ACD (not used for Evo7+ EFI Diagnostics) join this pin to Ground (pin4 or 5) with a paper clip to get self diagnosis flashing lights on the dash to read the trouble codes by way of Long (+10s) and short (+1s) flashing lights. << Pin1 Very important for mitsubishi diagnostics, ensure this is connected to EFI ECU pin 56 (evo4-8).
How to check egrt temperature in Mitsubishi 2G?
The 2G’s don’t use an EGRT temperature probe to check the EGR operation, they use the MDP Sensor, which reads in psia. So, Right-Click on the EGR Temperature line, change the formula to x*0.07353-0.0725, change the label to MDP Sensor, the LOGReference to MDPpsia, and the units to psia.
Why is my car surging at idle speed?
When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.
Can a failed IAC cause engine stalling at idle?
A problem with the IAC should throw a P0505 code. A failed/problematic IAC can cause engine stalling when off-throttle, and/or excessively high engine rpm, particularly at idle. The IAC, signaled by the ECU, controls the throttle opening at idle.
Can a cracked IAC valve cause an engine surge?
If the hose is cracked or damaged, the engine will react as though the IAC valve is faulty. Also note that Toyota and Lexus vehicles may feature a non-motorized, magnetic IAC valve, requiring periodic cleaning of the IAC air inlet. In order to isolate the issue, clear any codes, then disconnect the IAC and start the engine.
How often does the engine idle during a drive?
• The learned idling air flow volume remains at the maximum or minimum volume five times or more during a drive cycle. • After driving at 6.25 mph or more, the actual engine idling speed varies from the target idling speed by between 100 and 200 rpm, five times or more during a drive cycle.