TOPIC: OBD-I GM Powertrain in a Euro RV

Hello to all gadgeteers. Im off to groove a v8 tbi, and I have the possibility to use diagnostic tools and exsaust analizer.

I know this is different to a simple generator, Ill geet a exsaust temp reading before and after. exsaust fuems before and after. and maybe fuel air ratio before and after.

What is importent for me not to forget?

I will get as mutch before data as i can then ill groove and check vacuumlines move and cap pcv. This is an older camper.

tips pleace, more data to come on wednesday including fotos

Hey, Markus!

If you use the term "TBI" be sure you know that to be a "Throttle Body Injected" style!

To help us help you, having the Year, Make, Model and engine size. That way we can search our mental database for similar engines.

Be sure to take video and pics whenever possible!

Now...

GET GROOVY!

ok yes. will try to make a documentary

big block 750 chevrolet, it looks to me like i dont have to do anything with pcv
I beleave 2 grooves with big bit. this groove wont be done until after summer holliday
Continuation in 2 months. Tips always welcome.

Hey Markus,

A shame it can't be done before the vacation road trips

The PCV valve, last picture, it is on the left valve cover with the smaller hose
coming off at a right angle.

Is that going into the base of the TB or the manifold, or is it plugged?

A friend has that TB on his pickup, will be interesting to see how it responds.

Do it... just do it...

Karl Fortner
Tacoma, Washington

ok will rerute that one.
Thanks Karl

I'm not so sure that's the PCV line, amigo's.

As we're looking at a 454 (7.5L) TBI system, the PCV runs off the rear of the TBI. You'll know for sure when you take the breather off, for the other line runs to the breather itself...

Have a GREAT time!

Ron

My RV is named 'Bob', Bob has a Chevy 454 (circa 1982) under the cover, same identical part.

Either way if it has a vacuum connection, it's worth checking into.

Karl Fortner
Tacoma, Washington

p:lol: at last a bit of a challane

hm, i cant upload pictures, bommer, Ive now grooved the tbi, epoxy the iac and reruted it, Ill keep trying to upload what ive done.

here are some vids doing this dual tbi for 750 chevy
gadgetgrooveboy olof - YouTube

Hi karl, Question, Does This tbi system need a massflow meter ? Where is it. Or where would it normaly be? so far ive only got experiance with them being between the air filter and the throttle body. Ive grooved it and there is space for the big bit , being carefull not to cut into where the screws go. used the wrong type of epoxy, will clean that up and redo,
Chers and best wishes to everyone