cutlassefi

If you have play in the TPS vs the shaft, you’ll have a stumble that’ll be hard to get rid of unless you do your transient via MAP. Which really isn’t the way to do it no matter what.

olds 307 and 403

Thanks Mark, yeah it isn't ideal and don't plan on leaving it that way long term. I did confirm timing within a degree, found a minor fuel leak at the rail and did put a manual gauge on it, reading over 50 psi. Is it normal for the IAC to read very high at a start up? I may have went the wrong way on IAC curve.

cutlassefi

It is what it is on the IAC, as long as it’s in single digits, hot, in neutral.

olds 307 and 403

Well, I still have a minor leak at the back rail, tightened it more, don't want it any tighter. One of the rails got a bit of a ding in shipping from Mark. Hopefully it sealed up this time. I may pull it and put in a new O ring or different fitting. But it ran and drove across town, that is something.

olds 307 and 403

Fuel leak is fixed, apparently an O ring is handy to seal the fuel rail. Well, I got my Ford TPS for the Speedmaster throttle body. It works, sort of. It has less of a lag in the throttle but only gets 60 percent TPS, no matter how I adjust it, including slotting the TPS mounting holes. The sensor goes to nearly 100 percent, just not with the throttle arm sweep. The US made Edelbrock 4 barrel includes and uses a Delphi GM LT1 TPS and GM IAC, whether it is the LS or earlier style, I have both on hand. It has good reviews and is available and cheaper than the Chinese Holley throttle body and not waiting on ships from China and currently on backorder. The only way I will buy another Speedmaster product is if someone like Mark goes through them, talking their cylinder heads, still holding out hope for the small chamber Edelbrock heads.

cutlassefi

For the record, if you want a first class throttle body, the Wilson 4 hole is the best quality piece you’ll ever see. Pricey, but first class.

olds 307 and 403

Would love one but over $1300 CAD shipped. The Edelbrock is 1/2 the price but doesn't include a MAT sensor built in like the Wilson.

olds 307 and 403

Well, I think this Speedmaster throttle body is BS. So I got a BMW TPS sensor. The 8mm D head fits the shaft perfectly bolts in the stock holes but the 122 degree sweep isn't enough. To get 0% at idle, it puts it at 70% WOT. For 100% WOT, at 26%. Looks like I am buying the Edelbrock throttle body tomorrow.

cutlassefi

You should be able to put some preload on the sensor, reset TPS, then see if it goes any higher on the other end.

olds 307 and 403

So do the reset wizard? I can try it tonight.

olds 307 and 403

Yeah, the TPS Wizard reset fixed it! Don't know why I didn't try it last night, used to nothing but road blocks on this build, I guess. 0 to 100% and instant TPS movement. This sensor is available cheap on Amazon from multiple sellers, so I will pick up an extra along with an extra LS IAC sensor to keep in the car.

olds 307 and 403

Well this thing has fought me tooth and nail but is now running and driving! I changed the oil to 10W30 VR1 with 1 liter of 20W50 for good measure. I start it and the belt started walking on the pulley! I guess it started wobbling and almost ate the belt. Apparently the bearing was going out on the Dorman A/C delete pulley. It is touch higher than the target idle has Zero IAC and TPS. Talking 850 in gear and 950 in park, running better as I drove it. Would like to thank Mark Remmel has helped me out as usual and I am sure I will be bothering him more to get the tune spot on.

olds 307 and 403

Well, I have been running the base Holley Terminator X Max tune with much more timing and the IAC at 8 rather than 40 percent. The TPS works flawlessly but goes massively lean on tip in and stalls when cold from stop signs. I am getting Cutlassefi to do a custom tune with better less generic parameters along with enabling the knock sensors. I also ordered the actual Holley to Terminator X Max laptop cable to properly tune this SEFI Olds 358.

fleming442

Here's an idea: measure it correctly before throwing parts at it. Or, ask a Toyota forum.

olds 307 and 403

Not sure what this has to do with my SEFI Olds 358?

olds 307 and 403

Mark sent me a better tune. For some reason my current one it isn't loading on the SD card. Renamed it and says on the handheld it downloaded. Will try one more time on a new SD card, saying the file is corrupted on Mark's end. I tried to download it to Holley's software, says it isn't a valid calibration file. The massive initial lean spike really sucks to drive cold in the morning.

OLDSter Ralph

Whats a Toyota ?

olds 307 and 403

Well, Mark sent me one of his tunes, definitely made it better. I finally got my tune loaded on a SD card to enail to him. Funny how a day off and new SD card, everything goes smoother. I also figured out where to load his tunes in the Holley files. Doimg **** after work never goes well. Loaded the revised tune from Mark, since he could finally look at my current tune. Hooked up my 300 psi gauge, showed 50+ psi, the little numbers are hard to tell, goes up in 10 psi. I started it, idle almost instantly went to where it should. Before it would either stall or struggle to idle above 500 or 600 rpm, I have it set at 850. I put it in gear and it didn't stall! My garage is downhill so it is under instant load. Will see how it runs and how steady the fuel pressure is driving.