Engine will turn over but will not start

CLOO

MEMBER
1998 MERCEDES BENZ 280
2.6L
6 CYL
2WD
AUTOMATIC
165,000 MILES

Just recently replaced my heater core and evaporator compressor. The process was hell but I got it done but figured I'd try everything out before I put the dash back on. Also I lost my only fob key in the meantime and had to have one made. Got everything plugged in, new battery full tank of gas, can hear the fuel pump turn on, key goes in car turns over but will not start. I've been researching if they have a ignition fuel shut of switch but cant find and info. Can anybody please help me out. I'm At a loss. Any idea would great. I think I've tried everything but you never know. I'm desperate after $3,200.00 worth of work. Thanks Craig O.

3 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Let's start with trying to find out if we have spark and fuel. We need to pull a plug and hold it against the block then crank the engine to see if we have spark. If we have spark then use starter fluid and see if it fires just to confirm a fuel issue.

I am thinking we have a security issue so I attached the way to deactivate the system. Let's run through this and go from there.

However, if it is not an alarm issue then we are a no start which is most likely fuel or spark as we can assume compression wasn't effected with what you did.

https://youtu.be/dCjmRL3p4Cs

Let us know what you find and we can go from there. Thanks

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