Getting serious..... So far code 34

[Lazarus]

Allrighty diving into this rats nest. Talking to my ecm. 34 34 34 with a true rats nest I'm only getting 1 code repeated 3 times. Now the mapp sensor was disconnected. So I played enny meeny miny moe and stuck it on a random line. Lol Manifold pressure here ya go! No!!! Noticed the cel comes on now after putting the temp sending unit back in. Rather than the $8.99 bosh temp gauge. Can someone please tell me where the black line with a little rubber boots goes? Maybe a pic ? Tried ciphering the diagram nothing says mapp! Thanks

 

[Lazarus]

Now am I right to say I no longer need the eac eas since this is going to a nonexistent air cleaner is there any electrical connections to these? Now do I need the efe crap since the car has headers. Any electrical connections to these? The eac crap looks like its directly connected at the car passengers side? The efe is connected to the valve selenoid on the drivers side.

 

[kustomkyle]

Don't know what good it would do you, but I believe this was the same code my car was giving me. It had something either to do with the MAP sensor or a vacuum leak.

I knew for sure there weren't any external vacuum leaks as I had just replaced all of my vacuum lines and there were no problems/symptoms of a leak. So I replaced the MAP sensor. No change.

What did turn the light off was a new oxygen sensor. There may be some internal intake leak or something, but the light hasn't come back on since the oxygen sensor was replaced.

The other problem obviously is, when the ECM/emissions equipment is messed with, you basically need to either remove all of it or replace and restore all of it in order for everything to coincide with everything else.

 

[Lazarus]

Yea working on that now. Going to weld in a bung for the o2 since somebody got the bright idea to make it fast. Hence killing the computer controls and now runs like a dog. No idea what my mixture is nor if the timing advance functions or any sort of baseline operation. So calling everyjunk yard asking if they have a 84-88 307 lmao. Did find 78 parts. To run old school not sure if the transmission would be affected by that or not?

 

[Clone TIE Pilot]

Yes it would, the ECM runs lockup in the trans.

 

[kustomkyle]

Interesting side note:

If you have issues with your lockup, unplug the big white plug on the LT/drivers side of the transmission.

Even after a TCC solenoid replacement and fluid change, the lockup was erratic. Felt like there was a severe issue within the transmission.

After unplugging the above said plug, it was as if I instantly had a new transmission. Thousands of miles later, still no real issues. You just don't have that imaginary 5th gear anymore.

 

[kustomkyle]

Yea working on that now. Going to weld in a bung for the o2 since somebody got the bright idea to make it fast. Hence killing the computer controls and now runs like a dog. No idea what my mixture is nor if the timing advance functions or any sort of baseline operation. So calling everyjunk yard asking if they have a 84-88 307 lmao. Did find 78 parts. To run old school not sure if the transmission would be affected by that or not?

Should be 1986-1990 Olds 307. Actually, most of the external equipment except maybe the exhaust manifolds were the same between the early 5A head (1980/1-1985) and 7A head (1985/6-1990).

Though, you'll only find the 307 Olds in B/D bodies after 1988. These would be the Olds full size wagons, Buick full size wagons, some Caprice (!) wagons, Caprice Broughams (!), and Cadillac Broughams.

A.I.R. tubes generally aren't salvageable (they rust/crack), as are the associated check valves (they're generally frozen to the rusted/cracked A.I.R. tubes and who knows if the diaphragm inside is any good). Last time I checked they were still somewhat readily available in stores. The only problem I had with the new replacement tubes (made by "KEM") was that the RT/passenger side wasn't quite spaced properly and took some persuasion to get screwed back into the head.

Best bet would be just to find a "backwoods" yard that doesn't really inventory stuff. This is where most of these cars are at. Though, by 2016, there aren't too many left. Thank you EPA and insurance industry.

 

[Lazarus]

Going up to Hooterville tomorrow with a hatchet to get back into the old section. Delta 88s Lesabers caddies. Lol growing agitated. Getting a state emmissions is Like talking to Marty moose on national lampoons Vacation. Huck huck SOORRY folks you need alot of sensors and the entire vacuum system replaced. Ok here is my Discover card with a $35,000.00 in open credit. $%&#@ FIX IT!! Huck huck SOORRY folks I'm not doing that job. Well pass it then!!! Huck huck SOORRY folks you need alot of sensors and entire vacuum system replaced.

 

[Lazarus]

Sorry bit of ranting. Got a buddy to illegally place a emission sticker. 🙂 Anyway I'm going tomorrow there is a old rwd olds Delta and caddy both with the 307. These vacuum lines are on every single fourm from jeep to Porsche and the answers are just as frustrating as the problem. So tomorrow I'm making a documentary film on every single connection to connection . hopefully solving the issue. If you guys like me to post it.

 

[Clone TIE Pilot]

Interesting side note:

If you have issues with your lockup, unplug the big white plug on the LT/drivers side of the transmission.

Even after a TCC solenoid replacement and fluid change, the lockup was erratic. Felt like there was a severe issue within the transmission.

After unplugging the above said plug, it was as if I instantly had a new transmission. Thousands of miles later, still no real issues. You just don't have that imaginary 5th gear anymore.

By unplugging it you lose lockup which decreases mpgs.

Now if the lockup is erratic after a solenoid replacement, then it is either wasn't the solenoid that was bad or you installed the wrong replacement solenoid. Lockup solenoids are application specific, a SS 200R4 uses a different solenoid from a non SS 200R4. I sure have had trouble with parts suppliers substituting incorrect parts for correct parts to save costs.

A bad or misadjusted TPS can cause lockup issues as well as opens or shorts in the wiring circuit. Could also be a bad ECM which is unlikely.