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September 2nd, 2007, 11:17 AM
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Error code 34- Low MAF signal issues
I have been chasing an error code 34 all weekend.
Translator plus, 3" LT1 MAF Extender chip with MSD 50's, TE44 turbo at 22lbs. I have replaced the ECM Switched MAF's Even switched out the translator to several stock MAF's with same result. Checked wiring... The support books I have show that the volts at the MAF plug B should be between 4 and 6 volts. I have only 2.77. the pink/blk volts are in the low 12.x's and the ground wire seems OK. Is this one of the ways the extender chip or translators adjusts for the max of 255 on the stock MAF?? In my other car with different chip and no translator and either ECM I get 5.2 volts. In addition to the error code 34, direct scan shows that the MAF signal bounces/ is very erratic at WOT. It can go from 108 to 68 to 112 with same RPM and TPS. I thought it was "noise" and added a relay to the 12 volt signal which corrected nothing. The MAF never get close to 200 at around 22LBS of boost. HELP!!
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Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars     
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September 2nd, 2007, 11:31 AM
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I forgot to mention this is on my 87 GN, not the hybrid!
I had less problems getting the hybrid to run right than the fricking mostly stock GN!
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Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 2nd, 2007, 02:05 PM
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can you post the DS file.
It sounds like the MAF wiring has issues. Both the power and ground wires to the MAF have factory splices in the harness and are subject to a lot of corrosion. Check the ECM harness plug for corrosion as well. Bob
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September 2nd, 2007, 03:23 PM
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I bought a replacement ECM connector repair kit from Caspers and soldered and replaced all the connections to the ECM. I still have the same issue.
How do I post the DS file?
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Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 2nd, 2007, 05:09 PM
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I disconnected the battery and the ECM. I traced and tested the B6 wire to the B MAF plug, good connectivity and nothing to ground.
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 2nd, 2007, 05:37 PM
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turbobob924, Can you post pics of the plugs on the translator so we can see what color wires are going to what? Thinking you may be configured wrong.
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September 2nd, 2007, 05:51 PM
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Hey just sell me that thing and you won't have to worry about it anymore Bob-O.
See you before too long....
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Steve The artist formerly known as MJRWOOD 87T
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September 2nd, 2007, 06:03 PM
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Rick,
These issues happen without the translator connected! Besides, I have checked the connections, the pink is aligned with the pink.
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 2nd, 2007, 06:18 PM
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Quote:
If you replaced the pigtails, you must have suspected corrosion. Is there corrosion in the ECM connector (or perhaps a missing pin?) Bob
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September 2nd, 2007, 06:37 PM
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The original ECM did have corrosion so I replaced it along with the pigtails.
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 2nd, 2007, 06:44 PM
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Quote:
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September 2nd, 2007, 08:35 PM
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No, where in the hell are the splices??
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 3rd, 2007, 09:38 AM
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Well the code 34 is gone, don't know why but the car now runs like crap!
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 3rd, 2007, 09:55 AM
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That really sucks. No luck attaching DS file to a post? Wish you were a little closer, I'd come help but crystal lake is a cruise for me.
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September 3rd, 2007, 01:12 PM
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The DS is an old computer with no floppy to even get at the files!
I will run some turbolink readings and post one. Thanks for any help guys. I used to think I knew what I was doing, this is a major wake up call!
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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September 3rd, 2007, 01:16 PM
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I had the same issue,
it was an issue with an ecm connection and the signal was dropping out., now that your code is gone, reset the ecm, ensure all dip switches are on, and all dials are at 0 another problem I found on a customers car was a Direct scan cable causing "Noise" in the ecm and causing malfunctions. disconnect that and try. your next step would be contacting Bob Baily or posting on fullthrottle's support forum Good luck
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1987 GN 235ci, forged pistons,steel main caps,ARP everything Crank & rods ground smooth and shot peened,Balanced 50/50,restriced cam bearings, high flow centre main oil galleys. high flow front cover, race ported big valve heads,speedpro 204/214 cam, PT70 Ptrim , 72 lb siemans injectors, extender extreme alky chip, 4" intake, LS1 Maf. Tranlator plus. ported throttlebody,Mease plenum, EGR delete race ported and welded intake. port matched to felpro 1200s, SMC alky , ESP Front mount, F body rad, TA girdle on the Diff, Atr bar, Boxed control arms, Stock ported headers and THDP, Blaa blaa blaa Quote:
www.boostedwhips.com (Help Wanted, apply within) 
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September 3rd, 2007, 01:19 PM
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Quote:
Mode switches On On Off Off. all other dials at 0
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September 3rd, 2007, 03:53 PM
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The chip number is BSL57C0F.
I even tried to eliminate the translator and put the stock MAF back in. Now it gets better. I went for a test drive and it stalled out so many times I had to have it towed back to my place less than 3 miles away! It would not even work in limp mode with the chip out. As I'm sitting ther waiting for the tow, I used turbolink not direct scan. I thought now the TPS was screwed up or something. Now with the key on and engine off the MAF sensor goes up in tandem with the TPS!!!!??? WTF??? At WOT 4.62 TPS the MAF goes to 255. THE damn engine is not even running!! This has to be some of the screwiest stuff I have ever seen. I am going to pull the engine harness and go thru all the wires. I had tested for shorts before but somehow there has to be a short here!!??
__________________
Bob Ward Crystal Lake, Il www.turbo924.com 87 GN, 61K miles- TE44, MSD 50's, stretched Stock IC, Walrpo 255 pump, hot wire kit, Extender, translator +, 3" LT1 MAF, RJS powerplate, Powerlogger, GNX gauge kit 80 Porsche 924 turbo hybrid powered by 86 GN-4.1 built by me- bored 40 over, PTE remote oil filter, hyper pistons, ported heads, 212 cam, TE63E, 60lb injectors, Bosch HV pump, custom FMIC, MAFPRO, LC1 WB, Porsche 5-speed trans, 560ft lbs to the wheels 99 Escalade- for towing project cars
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