The guy I raced said he has his stock,well I have put in a shift kit,airfoil,flowmaster, JET stage 2 chip, 160 stat, Mobil 1 oil, k&n air filter, accel wires and rotary cap with bosch platinum plugs. My car has a code 34 which cause the check engine light to always be on, i cant get it to go away. Could this be part of the problem? he put a good 2 cars on me and I shoulda beat him.We both have the 350 tpi's

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Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with Bosch platinum plugs, Accel distributor cap and rotary buttons.Gutted cat. Hope to port runners and plenum in about 2 weeks.

 

IMHO, '87s are slower than '89. Also, the '89s seem to respond to mods better than the '87s. Don't know why, but I remember that one thing is different, the '89s had a little higher compression ratio. The prom chips might have different fuel or timing maps too.



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'87 L98 TPI IROCZ, TF heads, 3.70 gears, LT1 cam?, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB, TB airfoil, TB coolant bypass, AFPR(48psi), K&N filters, Hotchkis lowering springs, Car-Pro custom chip, Lay Ind. ram air kit, 265/45R16 Kumho V700 tires, and still as slow as hell 13.82sec ET @ 106.3 mph. To be installed soon: TPIS ZZ9 cam, 2400 stall converter.
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow lid, K&N filter.
313.7Hp & 320.6ft-lbf

 

Speed density vs. MAF?

 

No, MAF didn't come out until 1990.

 

Code 34 is the MAF sensor. If your car runs good disconnect your batt. for a few minutes to clear the code. Run the engine above 2300 rpm for one minute. If it sets the code again clear it again and disconnect the MAF sensor and try again. Code 33 should set if it does check the red wire (terminal "E") for 12 volts. If you have 12 volts the MAF sensor could be bad. My 88 did this. Good luck.

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88 GTA
Stock 350
6-speed

 

code 34 would definately make your car slow, and btw the only thing you listed that would make any sort of difference would be the gutted cat and the flowmaster muffler and id say thats good for a combined 10 hp tops. Definately get the code 34 sorted out thats probably holding you back big time and get to porting, heads, cam, headers... those are the things that will make your car quick

 

That is incorrect... MAF was used from 85 to 89, Speed Density (MAP) came out in 90 and lasted until 92 as far as Third Gens are concerned.

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Kevin Irving
85 Trans Am WS-6, 305 TPI, custom burned '86 PROM with '87 "165"ECM, Accel Supercoil & 8.8 Wires, MSD 6AL, Aluminum Driveshaft, TB Coolant Bypass, Ported Plenum, Modified MAF, Cyclone Fuel Pump, JET Airfoil

Veiw my car at: http://www.geocities.com/transam85tpi/TransAm.html

 

The '88 & up L98's had a more agressive cam profile than the '87 (1st full year L98 F-body). HP was rated slightly less for '87.

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85 calif. iroc
383/A4
9" rear

 

My 87 IROC had a code 34...would run like crap too at random. Replaced maf and maf relay. Finally took it to the dealer who replaced the computer and it ran fine ever since. ???



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87 IROC-Z, 5.7, auto, 3.27, leather, !cat, Holley fpr, K&N'S, SLP 1-3/4" Jet-Hot coated headers, SLP cam, $uperPITAram, Edelbrock lower intake, Holley 52mm tb, Dynomax/Flowmaster catback
Coming Soon - Fasttrack/Accell DFI

SOLD ->91 Z28, 5.7, 3.23, Ported Plenum, Accel runners & lower intake, Accel distributor module, !dual cats, POS Edelbrock catback, K&N'S, ram air, tb airfoil, !tb coolant
Coming soon - Compucar N20 kit, Accel AFPR

 

cam specs in 87: 202/207 .404/.415 114.5
cam specs in 89: 207/213 .415/.430 117

89 got a better cam, obviously.

Aside from that, I think the dual-cat option became available in 89 (10 hp increase). There could also be a rear gear difference between the two cars (2.73 vs. 3.23).

Code 34 won't help you either. If the MAF is telling the ECM that there is less air entering the engine than there really is, you're probably running lean. I'd say you need to take care of that if you want your car to perform at its best. All the mods in the world might not mean much until you get rid of whatever is causing that code.

 

Well the MAF is brand new so I know it isnt that. I have replaced the relays and checked my IAC and its all fine. Yet the code still comes on. I dont know if I 2.73 gears or 3.23's. I have headers sitting at home, but I need to install them. When I do install them I will run the guy again. I also plan on porting my plenum and runners this weekend, maybe that will help too

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Bright red 87 GTA with 350 tuneport. Basic mods such as K&N filter, Flowmasters, Wells MAF, TPIS air foil, Accel 8.8mm plug wires with Bosch platinum plugs, Accel distributor cap and rotary buttons.Gutted cat. Hope to port runners and plenum in about 2 weeks.

 

I believe that all 350s in '87 had to come with the 700R4 auto tranny and the 9 bolt Aussie built posi rear end with 3.27 gears.
There are (I think) two metal tags on the bolts of the rear end cover. One of those tags lists the gear ratio. Also, if you know all of your codes, such as, GU5, this will tell you what gear ratio you have.

About the 34 error code, it is for low air passing thru the MAF sensor. Check the burn off relay and the connectors for the MAF itself, burn off & power relays. Clean up the contacts and disconnect the black ground terminal on the battery for at least 2 minutes in order to remove the error code.
Then go out and test the car.




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'87 L98 TPI IROCZ, AFR190 heads, 3.70 gears, ZZ9 cam, 2400 Art Carr TC, SLP 1 3/4" headers, SLP cat-back, no cat, no AC, no MAF screens, Accel manifold base & SuperRam, Edelbrock double roller timing chain, MSD ext coil & distributor, trans cooler, 52mm TB with airfoil, TB coolant bypass, AFPR(48psi), K&N filters, Hotchkis lowering springs, Car-Pro custom chip, Lay Ind. ram air kit, 265/45R16 Kumho V700 tires.
'90 Eagle Talon AWD, no rust thru 9 winters
'99 Camaro SS, red, 6-spd, T-tops, Mcleod clutch, Pro 5.0 shifter, MAF processor, Direct Flow airlid, K&N filter.
313.7Hp & 320.6ft-lbf, 13.55sec @ 105.1mph

 

Did you replace both the burn-on and burn-off relay, I had those damn codes, I saw some guys letter in Hot Rod about the same problem and he was told to replace both, so I went to the dealer ship and bought both and it cleared my 34 code. It's been a 1 1/2 and the proble has not come back.

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88 IROC-Z,L98 350 TPI, 700R-4 Tranny 2.77, K&N Filters, 126K Miles runs great. http://www.j-body.org/library/humor-...arearicer.html

 

I have a 89 GTA and they're pretty fast and its mostly stock with minor upgrades. I have never raced another GTA as i dont see very many of them, but i do beat hondas and the occasional mustang.

 

FIx the code 34 first, whether its the relays or the MAF itself.

160 t-stat is too cold, run a 180, trust me on this unless u take the time to investigate the stock tune or the worthless Jet chip u have.

Throw out the Jet chip and just run the stock memcal or invest in the time to learn aboutr doing your own tuning and gain actual impressive results.

later
Jeremy

 

You had me confused there for a second because I've never heard of the MAF relay refered to as a "burn-on" relay.

 

I've looked at my '88 and couldn't find a "burn-on" relay, where is it located? Does it do the opposite of what a burn-off relay does?

 

You guys realize that the thread starter posted about 6 years ago right? I'm hoping he sorted out the code 34 by now.

And Tellez probably meant the power relay.

 

Thanks, Red, guess I should keep an eye on the posted dates.

 

LOL 6 years.

 

hey guys theres always a saying A LITTLE LATE THAN NEVER! hehehe

 

I think all of us have had that 33-34 codes. They are all correct when they say replace the two relays located on the left hand side firewall (88 IROC) should be the same for the GTA. I had those stupid problems too and always seemed to come when I was at the track. But anyway that corrected the problem. They cost me 22 bucks at auto zone and after spending money on computers and chasing wires in my harness for a frayed one, I was pissed that all it was. I don't know if anyone on here agrees with me but its really easy to convert to a speed density system and get rid of the MAF all together.

 

I guess is kind of my fault as i started this 6 year thread.