TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Sponsored by:
Sponsored by:

car is still running like crap

Thread Tools
 
Search this Thread
 
Old 02-17-2008, 03:40 PM
  #1  
Member
Thread Starter
 
armygreen87's Avatar
 
Join Date: Sep 2007
Location: Marshall, TX
Posts: 184
Likes: 0
Received 0 Likes on 0 Posts
Car: 1989 IROC-Z28
Engine: 5.7 TPI
Transmission: 4-speed automatic
Axle/Gears: 2.77
car is still running like crap

okay...urgh this car has got me frustrated...It seems to be running rougher than it used to. idle doesn't like to stay constant half the time and the car accelerates like crap. when I change into 5th gear at 45MPH, the car stuggles to accelerate and then the engine and the gear shift "pulsate" like i changed gears too soon. the car is also running a lil rich. and when i turn on the defrost (on heat), after about a minute you can smell exhaust fumes in the cab. whats up with that? the car is acting like this has to be fuel-related, but gosh i dunno. i assume i got a gasket problem... i've changed out the MAF several times, changed the fuel filter, got the injectors cleaned out, oxygen sensor was replaced a few months ago, had the rotor replaced and the dizzy cap tightened, and theres more that has been done. I know i need a new tranmission mount, but i doubt thats whats causing the majority of my problems. every once in a while I hear a whine from the fuel pump...but my fuel pressure is good. my mechanic says it cant be the fuel regulator or else the pressure wouldnt be good and the regulator would be leaking. i think my starter is starting to go bad, every 1 in 10 times i crank it, it doesn't turn over properly, dont think the starter could be the main problem though. anyone got any suggestions? thanks
Old 02-17-2008, 04:24 PM
  #2  
Supreme Member

iTrader: (28)
 
TIMMYS89GTA's Avatar
 
Join Date: Jul 2006
Location: ocklawaha FL.
Posts: 1,564
Likes: 0
Received 1 Like on 1 Post
Car: 81z-28,89gta,91z-28 03 1500
Engine: 355,L98vette tpi,327
Transmission: TH350/700R4/700r4/4l80E
Axle/Gears: 3;73/3;27/2;73/3;73
Re: car is still running like crap

perhaps you're timing is off?
Also,I've heard of the exh. smell in the cab before,but can't remember what would cause that right offhand.Perhaps someone else can chime in on that.
Old 02-17-2008, 09:43 PM
  #3  
Member
Thread Starter
 
armygreen87's Avatar
 
Join Date: Sep 2007
Location: Marshall, TX
Posts: 184
Likes: 0
Received 0 Likes on 0 Posts
Car: 1989 IROC-Z28
Engine: 5.7 TPI
Transmission: 4-speed automatic
Axle/Gears: 2.77
Re: car is still running like crap

I adjusted the timing back and forth until i got it to where i think is close. do you know what the timing is supposed to be at and how to check it with a multimeter? i noticed that i only smell the fumes when the car is sitting still, so i assume that the AC system is just sucking up air from outside along with fumes from the rich exhaust...
Old 02-18-2008, 09:27 PM
  #4  
Supreme Member

iTrader: (28)
 
TIMMYS89GTA's Avatar
 
Join Date: Jul 2006
Location: ocklawaha FL.
Posts: 1,564
Likes: 0
Received 1 Like on 1 Post
Car: 81z-28,89gta,91z-28 03 1500
Engine: 355,L98vette tpi,327
Transmission: TH350/700R4/700r4/4l80E
Axle/Gears: 3;73/3;27/2;73/3;73
Re: car is still running like crap

on a tpi car,you need to unplug the tan/black wire next to the a/c heater box in the engine compartment.Then,using a timing light (not a multimeter)
set the timing to 0 degrees.That should take care of your crappy running and rich smelling problem.
Old 03-23-2008, 08:54 PM
  #5  
Junior Member
 
r62mcmahon's Avatar
 
Join Date: Mar 2006
Location: west palm beach fl
Posts: 84
Likes: 0
Received 0 Likes on 0 Posts
Car: 1989 IROC
Engine: L98
Transmission: 700R4
Axle/Gears: BORG WARNER /3:70
Re: car is still running like crap

CHECK IF THE CAT IS CLOGGED
Old 03-24-2008, 12:14 PM
  #6  
Member
Thread Starter
 
armygreen87's Avatar
 
Join Date: Sep 2007
Location: Marshall, TX
Posts: 184
Likes: 0
Received 0 Likes on 0 Posts
Car: 1989 IROC-Z28
Engine: 5.7 TPI
Transmission: 4-speed automatic
Axle/Gears: 2.77
Re: car is still running like crap

I had that checked out but i think it was ok according to the muffler shop, but the pipe that runs from it to the muffler had a bunch of tiny holes in it - major exhaust leak lol. the problem became more and more obvious when i could hear a putt-putting sound underneath the car in the center. it runs much better now, but still running a lil rich and not quit right. need to get that timing adjusted with a timing light and see how she runs then. i had a flowmaster put in while i was getting that pipe fixed, sounds sexy....
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
specialized
TPI
27
06-18-2022 09:26 AM
midge54
LTX and LSX
21
12-27-2019 04:14 PM
9192camaro
Engine/Drivetrain/Suspension Parts for Sale
16
02-03-2019 12:21 AM
Azrael91966669
DIY PROM
25
06-20-2017 04:04 AM
kyleb24
Camaros for Sale
2
08-15-2015 08:24 AM



Quick Reply: car is still running like crap



All times are GMT -5. The time now is 05:11 AM.