Engine Performance problem
1997 Hyundai Elantra 4 cyl Front Wheel Drive Manual 165000 miles
My 97 elantra stalled with no noise, shake, or anything. I didn't even know for sure the engine had shut off. It will not start again, I have checked the starter and battery at first and they were ok. I then checked the fuel pressure, replaced the fuel filter (It needed it anyway), checked the pump, and fuel was getting to the cylinders.
Then I checked out the ignition system. I started at the plugs to check for any damage or overheating concerns, but to no avail. I went ahead and changed the plugs and wires anyway, and confirmed they do spark, but the engine still does not crank.
The Idle Air control Actuator hums when the key is in the 'run' position, but the rotary gate in it does not open until in the 'start' position. This seems normal except the door only opens about 1/8 inch. Not nearl all the way it seems it should go.
While I was frantically removing and checking components, I checked the timing belt and valvetrain system (The entire Head basically) and they seem just fine. Almost perfect surprisingly. I want to know if I would be getting any spark if the crank position sensor was bad, and if the idle air acuator is only supposed to open that little bit.
Also, when we've tried starting it recently, the actuator would hum and occaisionally emit a loud grinding noise.
Any help on anything else I can check please?
The actuator costs 270 bucks and I'm making absolute sure it can't be anything else.
Do below to determine if its fuel or spark problem
Get a starting fluid/ether/better off gas in a spray bottle and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, cap and rotor /distributor pick-up coil, ignition control module, ECM, Ignitor cam and crank sensors- Note: If it doesn't apply disregard it
July, 15, 2009 AT 10:36 PM
Tried checking the plugs like so and had a spark at each one, checked fuel pressure and the pressure was really low. Tried blocking the fuel line further down and it went up. I changed the fuel pressure regulator and the pressure in the line has returned to normal.
But here's the weird part.
Now it sounds like it's trying to turn over with every rotation instead of just rotating and occaisionally trying. But still no start.
Took the spark plugs off again at the coils and only one would give me a spark.
The plugs continued to spark, though, and the start relay works, the plug wires seem to have the appropriate amount of resistance, too. The wires aren't broken, either and they have good grounds.
Is there any way I can tell if the coils are bad without having to scan the ECU? I don't have access to a scanner, unfortunately.
July, 26, 2009 AT 3:50 AM
It seems like I was testing and replacing parts till my Brain hurt. I decided to just change the engine out, and since I would have to remove the engine to check the condition of the lower timing belt.I did.
It was broke.
Luckily none of the valves got messed up from that.
But unfortunately none of the valves got messed up. That would have pointed me in the right direction in the first place! Thank you very much for all your help.