intermittent starting issue 93 300CE

[jlostlen]

I am having troubles with my car starting consistently.
Sometimes the motor will crank over and not start, it will sputter mildly (kinda like small caughs) and I will have to floor the gas pedal (its EFI , WTH?) After about 10 - 15 seconds of having the pedal floored, it caugh faster and faster until it starts up and revs out. If I do not floor the gas pedal, the motor
simply will not start.
Ther are no check engine lights to aid in diagnosing other than a upshift delay and also a have no check engine lights currently but I just cleared a code 21 and code 25 that have not come back on in a days worth of driving

The codes are
25 Upshift Delay
21 Purge switchover valve circuit open or circuit short
I did some research on both of these codes, they didnt look like the bad guys....

Thanks for reading

James

[jlostlen]

I failed to mention that the intermittent issue is that sometimes, the motor will fire right up. Having warmed up the car or driven for a long time does not seem to be a factor, it so far appears to be random.

[Arthur Dalton]

Possible OVP relay.

And 25 is not shift delay.it is possible ECU..which could fit OVP

[jhodg5ck]

+1 OVP.

Also curious as to the condition of your harness.

Jonathan

[jlostlen]

I did a search on OVP relay, did not find any results, what does OVP stand for?

Also, I thought that 25 is the upshift delay fault according to this chart.

The harness does seem to be in good condition though I did spot one section at the firewall behind the engine with I believe 3 wires that had some cracks, I need to track these down and replace or repair them...I have a picture attached of a cut into section of harness showing healthy wires.

Thanks for the replies

[Arthur Dalton]

There is no way OVP did not come up on a Search..there are enough OVP relay post in there to fill a NYC phone book.
Here is 500 post for openers...

http://www.peachparts.com/shopforum/search.php?searchid=4071968

Post #4
1994 e-320 codes where to start

..an go look at your code chart again...Shift Delay is CODE 26

[jlostlen]

Originally Posted by Arthur Dalton

There is no way OVP did not come up on a Search..there are enough OVP relay post in there to fill a NYC phone book.
Here is 500 post for openers...

http://www.peachparts.com/shopforum/search.php?searchid=4071968

Post #4
1994 e-320 codes where to start

..an go look at your code chart again...Shift Delay is CODE 26

You are right,

It was the upshift code, I gave the wrong number. It read code 26
And thank you for the link there is a ton of info on the relay, sounds like it is the problem, although I have not had the ABS light come on. I am reading more about the OPV and will likely order one tonight.

Thanks

[jlostlen]

I ahve an idea for a quick diagnosis of the OVP relay, can I just remove the fuse (which i checked and is fine) from the relay and try and start it and see if the syptoms are the same?
Will this damage anything?

[RBYCC]

Originally Posted by jlostlen

I ahve an idea for a quick diagnosis of the OVP relay, can I just remove the fuse (which i checked and is fine) from the relay and try and start it and see if the syptoms are the same?
Will this damage anything?

Remove the fuse and your symptoms will worsen as you'll just crank with no start.

Do you have one ( old style ) or two ( new style ) fuses on the OVP?

[jlostlen]

I have one 15A blue fuse, the relay is silver. There is another slot right behind the blue fuse, which I am assuming is for a spare...

[Cal Learner]

Originally Posted by jlostlen

I have one 15A blue fuse, the relay is silver. There is another slot right behind the blue fuse, which I am assuming is for a spare...

Are you sure you're looking at the OVP? Is the fuse under a red plastic flip-open top? I don't think the fuse is supposed to be 15A, and there's no "spare" slot. If there's an empty second fuse holder it's supposed to be occupied.

[jlostlen]

Here is some pics of what I am describing, It looked to be the OVP from what I have searched google images...

[Arthur Dalton]

Did you reead my post..I gave you the Old part# and the new Modified OVP part#,

SOOOOOOO,,why don't you look at the part numbers ?????????????????????????????????????????????????????????

[jlostlen]

I read the number off of my OVP and it is 000-540-67-45 (the new part number) with a blue 15A blade fuse. I replaced the fuse and starting still takes about 5-20 seconds. Also the idle is surging sometimes, going back and forth between 700 and 1000 rpms. I am going to continue researching this OVP relay as I am suspecting it is not at fault. Every post I have read so far, the symptoms include a ABS light on, which I have never seen come on.

[Arthur Dalton]

Ok

Go here:

E320 16 PIN DTC Charts inc. pin 8, pin 14

You want the codes from pin 8 and 14..

And do not assume you have to have ABS lamp to verify a bad OVP...
Next time it won't start , tap the relay ..