I need loads of Help!!!!!
#1
I need loads of Help!!!!!
Hi everyone im new here and love reading the forum. Heres the problem i just bought an 89 iroc 305 tpi when i first saw the car it would not start if all 8 fuel injectors were plugged in. If you unplugged #7 the car would start and run pretty darn good. If you started the car with #7 unplugged then plugged it in, the car would run rough and stall. So in theroy it would seem that the#7 fuel injector was no good. I trailer the car home and i change all 8 fuel injectors and start the car it started but was so load i thought it was going to blow up (i put the rails on the wrong side) swapped the rales to the proper sides and the car started and ran but ran rough. Sounded like it had a missfire (could feel the engine shake and it has a decent sized exhauzt leak and you could hear the put-put. So i change the plugs and wires. No change still not running right. When i start the car it idles high then comes down(dont know how high it idles the tach is broken) when driving it doesnt feel like its losing powder it moves when you give it gas. It does however seem to be idleing high like i dont have to touch the gas and im rolling 10-15mph. Ihave driven the car about 80miles and its just running rough it hasnt stalled but it smells bad (could be the exhaust its been welded a thousand times) i have done the following to the car
8 new bosh ll injectors (southbay)
Plugs+wires
Oil sending unit
Fuel filter
Changed the fuel lines from the fuel
Couple vacuum lines
Change the fuel lines from the fuel
8 new bosh ll injectors (southbay)
Plugs+wires
Oil sending unit
Fuel filter
Changed the fuel lines from the fuel
Couple vacuum lines
Change the fuel lines from the fuel
#2
I need loads of Help!!!!!
Hi everyone im new here and love reading the forum. Heres the problem i just bought an 89 iroc 305 tpi when i first saw the car it would not start if all 8 fuel injectors were plugged in. If you unplugged #7 the car would start and run pretty darn good. If you started the car with #7 unplugged then plugged it in, the car would run rough and stall. So in theroy it would seem that the#7 fuel injector was no good. I trailer the car home and i change all 8 fuel injectors and start the car it started but was so load i thought it was going to blow up (i put the rails on the wrong side) swapped the rales to the proper sides and the car started and ran but ran rough. Sounded like it had a missfire (could feel the engine shake and it has a decent sized exhauzt leak and you could hear the put-put. So i change the plugs and wires. No change still not running right. When i start the car it idles high then comes down(dont know how high it idles the tach is broken) when driving it doesnt feel like its losing powder it moves when you give it gas. It does however seem to be idling high like i dont have to touch the gas and im rolling 10-15mph. Ihave driven the car about 80miles and its just running rough it hasnt stalled but it smells bad (could be the exhaust its been welded a thousand times) i have done the following to the car
8 new bosh ll injectors (southbay)
Plugs+wires
Oil sending unit
Fuel filter
Changed the metal fuel lines from the fuel rail (where the injectors go) with rubber hose
Couple vacuum lines
Im lost and need help it did throw a code 43 one time when i was on the highway but i think it has nothing to do with this situation and this situation having everything to do with the code coming on. Please help thanks
8 new bosh ll injectors (southbay)
Plugs+wires
Oil sending unit
Fuel filter
Changed the metal fuel lines from the fuel rail (where the injectors go) with rubber hose
Couple vacuum lines
Im lost and need help it did throw a code 43 one time when i was on the highway but i think it has nothing to do with this situation and this situation having everything to do with the code coming on. Please help thanks
#3
Supreme Member
iTrader: (2)
Join Date: Apr 2000
Location: Huntsville AL
Posts: 3,938
Received 98 Likes
on
62 Posts
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: I need loads of Help!!!!!
Welcome!
Start here and do a lot of searching...there is TONS of info and knowledgeable members on here.
https://www.thirdgen.org/newdesign/tech/tpimod2.shtml
Good luck!
-Bob
Start here and do a lot of searching...there is TONS of info and knowledgeable members on here.
https://www.thirdgen.org/newdesign/tech/tpimod2.shtml
Good luck!
-Bob
#4
Re: I need loads of Help!!!!!
Welcome!
Start here and do a lot of searching...there is TONS of info and knowledgeable members on here.
https://www.thirdgen.org/newdesign/tech/tpimod2.shtml
Good luck!
-Bob
Start here and do a lot of searching...there is TONS of info and knowledgeable members on here.
https://www.thirdgen.org/newdesign/tech/tpimod2.shtml
Good luck!
-Bob
#5
Supreme Member
Join Date: May 2015
Location: Florida
Posts: 1,718
Received 245 Likes
on
189 Posts
Car: 1991 Z28
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3:42 Auburn
Re: I need loads of Help!!!!!
I think I would do the IAC reset. If you do a search on this forum you should be able to find the info with the proper way to do this. The IAC is the Idle Air Control and it is located in the bottom of the throttle body. You should take it out and clean the tip of the IAC and the air passage in the TB before you do the reset.
#6
Re: I need loads of Help!!!!!
I think I would do the IAC reset. If you do a search on this forum you should be able to find the info with the proper way to do this. The IAC is the Idle Air Control and it is located in the bottom of the throttle body. You should take it out and clean the tip of the IAC and the air passage in the TB before you do the reset.
#7
Member
Join Date: Apr 2014
Location: South of Joliet, IL
Posts: 221
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Firebird
Re: I need loads of Help!!!!!
Check your fuel pressure. What type of hose did you use when you replaced those hard lines? Double check all the routing and condition of the vacuum hoses. If it sat for a while the gas in there could be garbage as well.
Trending Topics
#8
Re: I need loads of Help!!!!!
The two fueling that are on the front of the fuel rack (where the injectors go) were never coming off and looked bad so I cut them and replaced with high pressure rubber hose. The car runs great when your driving no loss of power but you come to a stop and it idels like crap kind of surges then you move and it's fine it doesn't stall I'm not sure if the gaskets in the plenumem are right I can see some of the gasket sticking up on the top of the throttle body I sprayed carb cleaner and couldn't find a leak but if the gasket isn't sitting right in the rales in not sure if that could cause the problem that's pretty much the only thing I have ripped apart to replace the injectors
#9
Moderator
iTrader: (3)
Re: I need loads of Help!!!!!
So when you say rails, do you mean runners? I think so. Those are the big elbow macaroni looking tubes that come off the plenum in pairs of 2s, 8 in total obviously. ....there were a few different versions through the years, and yes, I think it IS possible to mix up the sides, and I think the gaskets for the runners and the base manifold also need to be correct to avoid a leak. ...I've messed with so many different TPIs with aftermarket runners, stock runners, aftermarketgaskets, etc. etc., and they're all a little different. I could be wrong...but....it can't hurt to double check and make sure they're right.
#13
#15
Re: I need loads of Help!!!!!
Got busy with work definitly ripping the plenum apart tomorrow i have all new gaskets as well. The car did stall in reverse for the first time. It drives fine but in drive the idle is awful like it surges, park idle is rough but not nearly as bad i just hope i can get this thing running perfect its a shame such a beautiful car not running right.
#16
Member
Join Date: Apr 2014
Location: South of Joliet, IL
Posts: 221
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Firebird
Re: I need loads of Help!!!!!
Got busy with work definitly ripping the plenum apart tomorrow i have all new gaskets as well. The car did stall in reverse for the first time. It drives fine but in drive the idle is awful like it surges, park idle is rough but not nearly as bad i just hope i can get this thing running perfect its a shame such a beautiful car not running right.
#17
Supreme Member
iTrader: (1)
Re: I need loads of Help!!!!!
I wouldnt have used those southbay injectors. If your taking off the plenum I would do all the gaskets down to the base. Reseal all the connections(threaded) to plenum and do the gaskets and orings on the tb. Get a new iac and iac gasket and check the tps voltage. Even though you didnt touch the screws,previous owner might have. If your going to get an iac get a name brand. Iac housing off and carb clean all the carbon.Timing light and do the timing. One more thing. When the plenum is off check the egr operation. Vacume on the line to egr will show you if its moving. Check condition of vacune lines. Cars this old have rubber hose issues and wiring could be chafed or broken. Also check all your grounds. Get the rust off and reseat.
Last edited by IROCZ1989; 06-09-2016 at 05:50 PM.
#18
Re: I need loads of Help!!!!!
I wouldnt have used those southbay injectors. If your taking off the plenum I would do all the gaskets down to the base. Reseal all the connections(threaded) to plenum and do the gaskets and orings on the tb. Get a new iac and iac gasket and check the tps voltage. Even though you didnt touch the screws,previous owner might have. If your going to get an iac get a name brand. Iac housing off and carb clean all the carbon.Timing light and do the timing. One more thing. When the plenum is off check the egr operation. Vacume on the line to egr will show you if its moving. Check condition of vacune lines. Cars this old have rubber hose issues and wiring could be chafed or broken. Also check all your grounds. Get the rust off and reseat.
#19
Member
Join Date: Apr 2014
Location: South of Joliet, IL
Posts: 221
Likes: 0
Received 1 Like
on
1 Post
Car: 91 Firebird
Re: I need loads of Help!!!!!
Back off your timing a little bit. Try playing with the timing to see if that helps. You may have the distributor advanced too much if you're knock sensor is tripping. Vacuum line going to the vacuum canister in good shape? Sounds like you got everything pretty much right.
The exhaust leak, it depends on where at it's at. I had exhaust leaks from the manifold to Y-pipe and I just took a U bolt and put that near the rusted and broken studs from previous owner, and tightened the hell out of it. If that is where the leak is, to fix it right, you may have to pull the manifolds and put new studs in. However, I would just put in a set of 2.8 headers at that point.
https://www.summitracing.com/parts/p...model/firebird
The exhaust leak, it depends on where at it's at. I had exhaust leaks from the manifold to Y-pipe and I just took a U bolt and put that near the rusted and broken studs from previous owner, and tightened the hell out of it. If that is where the leak is, to fix it right, you may have to pull the manifolds and put new studs in. However, I would just put in a set of 2.8 headers at that point.
https://www.summitracing.com/parts/p...model/firebird
#20
Re: I need loads of Help!!!!!
I am new also. I hope it is okay to ask this question on this thread. I have a SBC 350 in the back of a 1977 Porsche 911. I just changed from an Edelbrock carb to a 1985 Corvette TPI. I think I have a bad lifter or two. Can I remove and replace these hydraulic lifters through the push rod opening once the rocker arms and push rods are out of the way?
I have a Comp XE268 flat tappet cam and L98 Corvette heads. Help. I don't want to take everything apart to get to the lifters, but maybe that is the only way???
I have a Comp XE268 flat tappet cam and L98 Corvette heads. Help. I don't want to take everything apart to get to the lifters, but maybe that is the only way???
#21
Senior Member
iTrader: (2)
Join Date: May 2003
Location: Huntsville, AL
Posts: 539
Likes: 0
Received 2 Likes
on
2 Posts
Car: 87 GTA, 88 GTA, 92 TA, 72 RS SS
Engine: 350, 350, 305, 396
Transmission: T56, 700r4, 700r4, T56
Axle/Gears: 3.42, 3.23, 3.23, 3.73
Re: I need loads of Help!!!!!
You should post this in Tech/General Engine. at minimum you will have to remove intake and valve cover to replace a lifter.
Thread
Thread Starter
Forum
Replies
Last Post
broke91firebird
Electronics
7
09-02-2019 10:02 AM
Kfly67
Camaros for Sale
2
05-14-2017 08:37 PM