Engine Mechanical problem
1998 Mazda 626 4 cyl Front Wheel Drive Manual 120000 miles
The engine was replaced with a 30000ml driven one and after that the problems started. Only the basic engine is new, manifolds and supplements are from the original engine. Spark plugs and timing belt were changed when new engine was installed.
The engine sometimes dies when pressing the clutch down. When pressing the clutch pedal, RPM quickly goes near the 0 line; if the engine doesn't die, the RPM will rise back immediately to 1250rpm (idle is 750rpm). While car is on move, the RPM is 1250 and drops to 750only when stopped and waited a couple of seconds. If you let off the clutch pedal when RPM is going down, it immediately rises back.
If the engine dies, it restarts well.
It also feels like the the clutch pedal "attacks" your foot when accelerating and shifting gears. The car has clutch replacement done with the engine replacement
When headlights are on, the RPM drops easier to the 0 line.
Sometimes the car works a few days just fine, but usually is a pain to drive.
It used to have a diagnostic code for camshaft position sensor malfunction, but doesn't do it anymore; the sensor is replaced. The new sensor has touched the camshaft pulleyl and is now on with a self-made cardboard gasket that prevents it to touch the pulley.
The diagnostic code that it gives now is "Battery voltage under 8V". The alternator and battery have been checked, also the wires from PCM. The voltage has been correct everytime measured.
The car vibrates like an earthquake to inside when at idle. The idle rpm stays steadily at 750. The power steering/AC belt makes a whining noise that gets worse when RPM increases. The belt has been checked.
So far replaced:
Spark plugs, plug wires
Camshaft position sensor and its' connector
Intake Manifold gasket
Fuel pressure regulator
The bottom of ignition lock
EGR and IAC valves
Mass airflow sensor
Checked and tested to be proven OK:
Wires from PCM to alternator and Camshaft position sensor
Timing belt installation and other belts
Every fuse and fuse boxes.
After the installation both seat heater elements as well as the blower element died. Had to replace the blower element with new one.
Everything should work fine, but doesn't. What could it be any more? I've already spent four months and around $1500 on three different mechanics (including a Mazda dealership, the workshop that replaced the engine and a car electrical repair shop) who haven't found anything.
have the same problem?
Tuesday, December 23rd, 2008 AT 7:14 AM