The '89 300E

[Rahulio1989300E]

I went to Pep Boys and Home Depot to pick up carb cleaner and a mechanic's tool kit. I wanted to get some work done today.

Here are the current problems with the car:

1. Low RPM idling, stalling
When the engine is cold, I start it and it idles around 500 or less RPM. Sometimes it will just quit and stall out. Sometimes it will surge and go back and forth between 1000 RPM and almost 0 RPM until it dies.

When it gets warm, it usually idles at a constant, but low 500 RPM... This is not normal!

2. Antenna Seals missing or cracked.
- No description -

Here is what I did today.
1. replaced both lower and upper antenna seals
2. replaced air filter
3 replaced distributor cap and rotor.
4. cleaned idle control valve with carb cleaner

CAN ANYBODY HELP ME SOLVE MY STALLING/ROUGH IDLE PROBLEM!?!?!?!? PLEASE HELP!!!!!!!!!!!!!!!

[s124Monoblock]

Your symptoms sound like the over voltage protection relay (OVP Relay).

(Try a search on OVP)

Stalling and surging happen when OVP goes bad. Also for some reason, ABS light also tends to turn on when stalling.

Did you jump your car recently? OVP fuses usually blow when you do this.

It's located behind the battery - It's the small relay with red fuse on top.
Check fuse first. If blown, replace 10A fuse.

Also, solder joints inside the relay goes bad. In this case, open and resolder circuit or simply replace the whole relay...

If OVP doesn't fix it, it could be your fuel delivery system... Fuel filter, fuel pump etc...

Good Luck!

[Rahulio1989300E]

Thank you for your reply...

On 1/16/05 I removed the OVP and ran the car, it had the same problems.
The red 10 amp fuse on top is fine.

BUT.... One morning, I started that car, and the ABS light was on for about 15 seconds!

I spotted a old but complete 300E on a antique car lot...

I am going to try to talk the old man there into letting me gut it for parts...

I will try to get the...
1. OVP relay
2. Fuel pump relay
3. Idle Control Valve
4. few cosmetic pieces
5. antenna unit or mast