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Start right back up? if it does , then pull the vacuum hose off the fuel pressure regulator and and a stall . if gas comes out of the regulator/and hose. Thats the problem , bad diaphram in fuel pressure regulator!! $45.00 @ auto parts store , snapring pliers is only tool you'll need!! ($5.00 tool) Chep and easy!! :) Hope this helps!! Richie
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It seems like the problem lies with the engine management system, rather than the brakes. Given that you've already replaced the MAF, MAP, and TPS sensors, here are some other things to check:
1. Vacuum leaks: Inspect all vacuum lines for cracks or damage that may be causing a leak. A vacuum leak can cause erratic idling, poor acceleration, and stalling.
2. Idle air control (IAC) valve: The IAC valve controls the engine's idle speed. A malfunctioning IAC valve can cause the engine to stall during idling. Try cleaning the IAC valve with carburetor cleaner and see if the issue is resolved.
Check for applicable trouble codes. Some of the national brand auto stores will check codes for free.
You may need to clean the throttle body and clean those small passages. With a high idle block off mouth of throttle body, should have a big effect on the idle? There are several issues that could cause idle to act up. Vacuum leak--maf and or map sensor. Don't replace anything unless testing points you in that direction.
Can position sensor, maybe, or it might be called a pick-up coil. This sensor is needed along with crank position sensor for computer to determine spark timing. When you get it started, and if you still have the up and down idle, check for an intake manifold leak.
the iac code has nothing to do with the maf . the maf is your mass air flow sensor and it is in the air tube going to the throttle body. the iac is your idle air control valve that is in the throttle body next to the throttle position sensor
DTC P1506 is set when the PCM detects the
engine idle speed is greater than the desired rpm. This is most commonly
caused by a dirty or bad IAC valve. Cleaning the throttle body will,
most likely, cure this problem.
p1131 means that the bank #1 O2 sensor, the bank closest to the firewall,
cylinders 1-3 is showing a lean mixture. Could be a vacuum leak, a
misfire on that bank, an exaust leak upstream of the O2 sensor, fuel
control or injector problem on that bank, a faulty O2 sensor, faulty
PCM, faulty wiring in the engine control wiring harness. P0171In the vast majority of cases, simply cleaning the MAF sensor does
the trick. I
find it's
best to take it off and spray it with electronics cleaner or brake
cleaner.
Make sure you are careful not to damage the MAF sensor, and make
sure it's
dry before reinstalling also Inspect all vacuum and PCV hoses, replace if necessaryCheck for a dirty fuel filter and proper fuel pressure
On modern day cars the parts that get fitted need to be adapted to the ECM using a decent diagnostic machine. I bet that this was not done and the car is now suffering as a result.
Something to try is resetting the ECU, simply disconnect battery for 10 minutes, reconnect, then start car from cold *without touching gas pedal* and leave idling until the rad fan comes on (this resets all the base idle settings) then take it for a drive - hopefully will solve the problem
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