DIY_EFI Digest Tuesday, April 13 1999 Volume 04 : Number 224 In this issue: Re: Motronic error states / limp home mode Re: sequential gearboxes Re: 302 vs 460 Re: 302 vs 460 Re: Eletronic throttle control effect of leaded gas on wideband O2? See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Mon, 12 Apr 1999 14:26:30 -0700 From: Jason_Leone@xxx.com Subject: Re: Motronic error states / limp home mode <> You need to talk to Garrett Lim. He knows those Bosch Motronic ECUs better than anybody, and tweaks them better than anybody. There should be two data link connectors somewhere in the car (check under the shift boot). They can be jumpered to make the ECU spit out the OBD I DTC (Diagnostic Trouble Codes), via the check engine light. You can also clear any stored codes using the jumper method. It beats paying for a VAG 1551 scan. I don't think the "limp mode" can be reset that way, and I don't think the codes are stored in the EPROM either (if you wanted to do a chip swap to clear codes). Again, Garrett can answer all your questions, and can solve your code problems once and for all. http://www.giacusa.com/welcome.html Check out his sight, and drop him a line. Jason '93 SLC ------------------------------ Date: Mon, 12 Apr 1999 18:47:00 EDT From: FHPREMACH@xxx.com Subject: Re: sequential gearboxes In a message dated 99-04-12 10:32:23 EDT, you write: << > > > How does a sequential gearbox change work and could it > > be possible to convert a gated box ie H pattern to a > > sequential change. > > > > Thanks Roy >> Hi, I have been looking into this. The only restrictionis the need for a CNC mill with an active 4th Axis and the software to program it. That and size. Yes, it would be similar to a motorbike. I am intersted in programming it and building one for a Lotus 7 type special. I will be probably be using the 1965 Cortina GT motor and trans with an EFI system. Nicely, it has the shift mechanism forward enough to get rid of the problems of mounting the drum over the top of the box like a Mustang or similar application. Luckily, I am a rep for a CAD/CAM software, so I am going to do it and use it to demo some features. I will keep the list posted as it comes together. Fred Harmon ------------------------------ Date: Mon, 12 Apr 1999 22:22:43 -0500 From: Tom Sharpe Subject: Re: 302 vs 460 Pat Ford wrote: > > What type vehicle are you using? With less than the weight of a fat lady > > separating the two and much of that compensatible by moving the battery to the > > trunk, aluminum intake and headers - contrary to popular opinion it aint gonna > > matter much. > > probly a cobra kit car, I have a 2400 lb shell valley with a heavy kevlar body and hard top, 406 SBC, Brodix, T350, 9" 2.75 auburn, efi, Vette brakes, yadayadayada. 11 flat@130 on street radials. There's a stock 428 in town and another 427 with good heads, both carburated 4 speeds. The 428 doesn't have a chance. The 427 can catch me in the quarter if he uses a lot of clutch and tire off the line. If he hit's it too hard, he can't catch me till 140+, he has already used up one Jag rear end. >From a rolling start, it's even until I hit second (70mph) then he starts pulling away. at 130 he has about 4 cars and I go third and it's over. My point is that if you don't have a real 500HP motor, leave it in the garage. Small blocks make good parade cars... Sharpe ------------------------------ Date: Tue, 13 Apr 1999 00:23:12 -0400 From: "Bruce Plecan" Subject: Re: 302 vs 460 - ----- Original Message ----- From: Tom Sharpe To: Sent: Monday, April 12, 1999 11:22 PM Subject: Re: 302 vs 460 Yawn, My dog is smarter than your dog, is usually is for the wax brand comparing lists. Bruce > My point is that if you don't have a real 500HP motor, leave it in the garage. > Small blocks make good parade cars... Sharpe ------------------------------ Date: Tue, 13 Apr 1999 01:04:57 EDT From: JCsDOOR@xxx.com Subject: Re: Eletronic throttle control the iac valve handles all air .% of opening can be read off obd -2 data Jim Crance Co.,springs Co... ------------------------------ Date: Tue, 13 Apr 1999 00:19:15 -0500 From: greg kring Subject: effect of leaded gas on wideband O2? I know leaded gas will poison a standard oxygen sensor, but what happens to the UEGO wideband sensor under repeated use with leaded gas? Most of the racers I know just leave their standard sensor in at the dragstrip using leaded gas, then switch back to unleaded for the street. When the sensor goes bad, about once or twice a year, they just replace it. Easy to do with a 30 buck sensor, not so with a high dollar wideband. The whole purpose of the wideband on my Fel-Pro system is to tune at wide open throttle, which happens at the track with 116 octane leaded gas. Any ideas on life expectancy? We are talking 5 or 6 passes down the track, then back to street gas all week. Greg Kring Arlington, Texas ------------------------------ End of DIY_EFI Digest V4 #224 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".