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Car wont go over 3500rpms Posted By: jose93z28 On: 04-22-2008 @ 22:23:58 Reply | Edit My friend has a 89 firebird with a 305 v8 fuel injection, and he started having this problem a few days ago, the car wont go over 3500rpms it feels like its hitting a rev limiter or something, car is all stock and he has replaced the distribuitor, the plugs and the coil with no luck, any ideas ?? or has this happen to somebody else? -- 93z28 T70 Front mount Turbo 383 stroker dished forged pistons ported heads & intake 202 160 valves 52mm msd 6al 2step cap&rotor coil and wires, internal and inline walbro 255 pumps adj fuel press regulator 60 psi injectors chip by pcm4less no cat a4 to 6spd swap egr, a/c & smog pump delete, 411 gears work in progress.  Posted By: Green97TAMachine On: 04-22-2008 @ 23:44:51 Reply | Top | Edit Sounds like it's starving for fuel. Do full fuel system diag's and go from there. -- 1997 Mystic Teal Trans Am, M6, Leather, Hardtop. TB Bypass, CAI, Open Pacesetter LT's !CATS, !AIR/E.G.R., !CAGS, PCM by Thunder Racing. Best Time: 13.984@102.99Mph Posted By: Calaban007 
On:
04-23-2008 @ 00:42:33 Reply | Top | Edit
Press the pedal harder! Seriously, it sounds like a fuel issue. Is it missing or anything? --  1995 Camaro Z28 & 1989 IROC-Z Stock restoration in progress, well almost stock  http://www.myspace.com/163296073 Posted By: Pocket On: 04-23-2008 @ 01:41:43 Reply | Top | Edit What code has it thrown? -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: LeadFootedRacer
On:
04-23-2008 @ 17:32:35 Reply | Top | Edit
code blue? -- 
--Fbody.Com Site Donator-- Posted By: chad8329 On: 04-23-2008 @ 19:18:06 Reply | Top | Edit My Caps Lock Button Is Broken -- 
1992 Pontiac Firebird 3.1L V6 Auto 129,000 miles Dark Aqua Metallic Posted By: chad8329 On: 04-23-2008 @ 19:19:40 Reply | Top | Edit plugged catalytic converter.....happened to me, would floor the car and it wouldn't go above 3000 rpms. --
1992 Pontiac Firebird 3.1L V6 Auto 129,000 miles Dark Aqua Metallic Posted By: klez On: 04-23-2008 @ 21:35:56 Reply | Top | Edit hey my car did that once too...(the only time i pushed it that hard). mine is a 1988 GTA w/ 120,000 miles, all stock....and when i hit about 4000 rpms...prolly around 120mph or something (my speedo doesnt work), the car started doing this lurching thing..like it was 100% topped out Posted By: Pocket On: 04-24-2008 @ 01:42:50 Reply | Top | Edit We could play this "my problem was this" game all night What code was thrown and we'll work from there -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: roubenbird On: 04-24-2008 @ 13:55:21 Reply | Top | Edit No, No John. It's deff his brakes causing his problems. It happened to me once so it has to be the same thing. You and your logical diagnostics. -- Being rebuilt, It'll take a while: 
WS6 3o5 TBI 88' Formula, 670cfm Holley Projection Throttle Body Holley Projection Intake Mainfold, Underdrive Pulley,Dual Snorkle & Factory Cowl Induction,now with short straight pipes, UMI Subframe connectors, Fourth Gen seats, Three row Radiator, Posi rear end (2.73),TPI heads, 1.6 roller rockers 15.543 @ 88.21mph Posted By: Pocket On: 04-24-2008 @ 14:26:19 Reply | Top | Edit yeah 'Toopid brake distributor modulator -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: jose93z28 On: 04-24-2008 @ 17:22:23 Reply | Top | Edit Thanks for all your replies, good or bad JK but ill tell him to check the fuel press or disconnect the y pipe to see if it makes a difference -- 93z28 T70 Front mount Turbo 383 stroker dished forged pistons ported heads & intake 202 160 valves 52mm msd 6al 2step cap&rotor coil and wires, internal and inline walbro 255 pumps adj fuel press regulator 60 psi injectors chip by pcm4less no cat a4 to 6spd swap egr, a/c & smog pump delete, 411 gears work in progress. Posted By: Shift On: 04-24-2008 @ 23:01:12 Reply | Top | Edit It's your Brake Shoe Retracting Speed Sensor. Happens all the time on fbodies. Thank me later  --  Posted By: jose93z28 On: 04-26-2008 @ 19:28:08 Reply | Top | Edit LOL very funny -- 93z28 T70 Front mount Turbo 383 stroker dished forged pistons ported heads & intake 202 160 valves 52mm msd 6al 2step cap&rotor coil and wires, internal and inline walbro 255 pumps adj fuel press regulator 60 psi injectors chip by pcm4less no cat a4 to 6spd swap egr, a/c & smog pump delete, 411 gears work in progress. Posted By: hurley_21_07 On: 05-07-2008 @ 15:20:22 Reply | Top | Edit klez, your car was topped out at the limiter. They were talking about it just won't go past 3500 at all, not in a top speed run. Dan -- '98 Trans-AM WS6 Mods: MTI Clear Lid & Filter, Pacesetter LT's, TSP True Duals, BMR STB, BMR SFC's, 180 Thermo, LS1Edit, Sitting on Sumitomo 315's and TTII's 
==Sold but NEVER forgotten: 1997 Camaro V6 - Intake, Ignition, 180 Thermo== Posted By: Pocket On: 05-07-2008 @ 15:45:01 Reply | Top | Edit Only base models had the fuel cut off at 117mph 2.8 and LO3 Poor mans fix to this was to install a switch in the VSS output Not like those cars had much power left anyways... Anything TPI had no limiter -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: klez On: 05-07-2008 @ 22:49:29 Reply | Top | Edit well im pretty sure my TA can go over 120 , or atleast it should. maybe plugged cat, maybe not enough fuel/ air, but i am in the process of intstalling those ported Slp runners, ported intake, and ported plenum, AFPR, k&n air filter, 200 degree fan switch, and a 180 degree thermostat. we will see what itll do after this... hopefully ill atleast be able to tell a difference in overall performance. Posted By: Pocket On: 05-08-2008 @ 01:56:58 Reply | Top | Edit When will you people learn that lower temp thermos suck ass -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: klez On: 05-08-2008 @ 19:37:10 Reply | Top | Edit ok, y do they suck? help me learn, i dont think ive had this lesson Posted By: LeadFootedRacer
On:
05-08-2008 @ 20:13:44 Reply | Top | Edit
you dont want to over cool. GRANTED a 180 thermo aint too bad, they do make a 160 wich is retarded. the stock thermo is a 195, now why would you run a 200 fan switch? if your worried about getting cool, do the TB bypass. you dont want your intake charge warm. if you do the TB bypass, you'd be cooling down the intake charge, making it denser, leading to a lil more pep. -- 1987 Trans Am - 5.0 Auto - SOLD 1989 K-5 Blazer - 5.7 - 4" Rough Country Lift - 35" BFG All Terrians -- Fbody.com Site Donator -- Posted By: roubenbird On: 05-08-2008 @ 22:50:08 Reply | Top | Edit I'm sure GM just picked a random number for the fans to turn on anyways. When I was young I fell for the lower thermo. The car doesn't want to warm up, ever. Especially in the winter. therefore, the O2 sensor doesn't get hot enough. Therefore the EMC never kicks into closed loop. And it's always using preset parameters. Therefore, it sucks. Consider yousrelf schooled! Pow! Pocket will add to this I'm sure. -- Being rebuilt, It'll take a while:
WS6 3o5 TBI 88' Formula, 670cfm Holley Projection Throttle Body Holley Projection Intake Mainfold, Underdrive Pulley,Dual Snorkle & Factory Cowl Induction,now with short straight pipes, UMI Subframe connectors, Fourth Gen seats, Three row Radiator, Posi rear end (2.73),TPI heads, 1.6 roller rockers 15.543 @ 88.21mph Posted By: Calaban007
On:
05-09-2008 @ 00:08:32 Reply | Top | Edit
I have a 160* in my Z28, but the O2's are heated so that doesn't cause a problem. I had planned on putting a 180* in my IROC, though. Isn't the whole point, cooler engine = more timing advance? --
1995 Camaro Z28, M6, T-Top Conversion & 1989 IROC-Z Stock restoration in progress, well almost stock
http://www.myspace.com/163296073 Posted By: Pocket On: 05-09-2008 @ 02:11:49 Reply | Top | Edit On a carbed car, yes, you can run slightly more advance and get away with it On a fuel injected engine you run into problems like what Bennie went over 95% of people are not going to re-tune the ECM (PITA) and 98% will not be changing to a heated O2(dont know why they need it) TB bypass is pointless too Coolant runs 200ish degrees The cyls run a hell of alot hotter The intake is aluminum, which like all metals is a decent conductor of heat The heatsoak of the engine will be far above the minute amount of coolant slightly warming one spot on the TB -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: Calaban007
On:
05-09-2008 @ 02:31:31 Reply | Top | Edit
Actually the TB bypass does help. Not much but a gain none the less. http://www.ws6.com/mod-8.htm --
1995 Camaro Z28, M6, T-Top Conversion & 1989 IROC-Z Stock restoration in progress, well almost stock
http://www.myspace.com/163296073 Posted By: Pocket On: 05-09-2008 @ 11:38:36 Reply | Top | Edit Riiiiiiiiiight -- "If you have complete control over the damned thing, you're not going fast enough." - Carrol Smith Posted By: Calaban007
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05-09-2008 @ 12:02:43 Reply | Top | Edit
My point being about the TB Bypass is that it's not going to hurt anything by doing it. Even if the gain is questionable or minute. It has no negative effects unless you live in a very cold climate. The statements about cooler thermos on the 3rd gens make sense, I assumed that 180 would be hot enough to get it into closed loop though, and I had planned on getting a chip for it eventually. I may wait on the thermo until I get the new chip so there will be no closed loop problems. I have to finish the body first. Whenever that will be... Edit: Clarified my statement about the cooler Thermo. --  1995 Camaro Z28, M6, T-Top Conversion & 1989 IROC-Z Stock restoration in progress, well almost stock http://www.myspace.com/163296073 [ Edited on 05/10/2008 @ 22:46:07 ] Posted By: klez On: 05-10-2008 @ 18:29:23 Reply | Top | Edit well i have heard all this about thermostats on TGO, yes, a 160 degree thermo is not a good choice w/out a new tune. and ive heard all the problems it causes. But after all, the 3rd gen engines run HOT, ofcourse this helps w/ the emissions, but it sucks for performance. Everyone on TGO says a 180 degree thermo is fine and wont cause any problems, after all it isnt very far from the stock 195 degree thermo. So anyways, when you buy a lower thermostat, you want your fan to match it, aka a lower temp fan switch. feel free to set me straight if i'm wrong, just be constructive please
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