LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

need some help

Thread Tools
 
Search this Thread
 
Old Jun 13, 2007 | 01:06 AM
  #1  
pony_killer95's Avatar
Thread Starter
Registered User
 
Joined: May 2007
Posts: 7
need some help

ok my camaro wont run...
its a 93 z28 lt1....
fuel is making it all the way to the fuel rails...
put new fuel filter and pump is working great....
it seems that the engine is not getting gas...
it fires up with starter fuel but then dies...
fuel injectors? electrical...?

need some help thanks
Old Jun 13, 2007 | 08:38 AM
  #2  
2000GTP's Avatar
Registered User
 
Joined: Mar 2005
Posts: 12,312
From: Aurora, IL
I would put a gauge on the Schrader valve and see what the fuel pressure is doing.
Old Jun 13, 2007 | 09:54 AM
  #3  
n2ceptor's Avatar
Registered User
 
Joined: Sep 2002
Posts: 3,456
Could be a number of things.... fuel pressure, no signal to fuel injectors, loose connection, etc..

Are there any codes???????
Old Jun 13, 2007 | 09:57 AM
  #4  
ZL1modified's Avatar
Registered User
 
Joined: Nov 2005
Posts: 646
From: PA
i would guess a weak spark... starting fluid is highly combustable and does not need much heat to combust...
i would pull a plug and see if it looks wet...
Old Jun 13, 2007 | 12:28 PM
  #5  
pony_killer95's Avatar
Thread Starter
Registered User
 
Joined: May 2007
Posts: 7
what is a good pressure reading.... at least what??
If the fuel pressure is good... what is a way to test the connection... i pulled out the fuses for the injectors and both 7.5 amps were good...
when you say pull and plug do you mean pull a spark plug wire from the block and feel for any liquid?
i dont have a comp reader.... where is a good place to pic one up and price?
Old Jun 13, 2007 | 12:35 PM
  #6  
ZL1modified's Avatar
Registered User
 
Joined: Nov 2005
Posts: 646
From: PA
no, i meant pull a spark plug and see if it is wet... this would tell you if you are getting fuel and no spark... i honestly don't think it is a fuel problem...(but i have been wrong befor)... good luck

pressure should be ~38 psi @ idle...

Originally Posted by pony_killer95
what is a good pressure reading.... at least what??
If the fuel pressure is good... what is a way to test the connection... i pulled out the fuses for the injectors and both 7.5 amps were good...
when you say pull and plug do you mean pull a spark plug wire from the block and feel for any liquid?
Old Jun 13, 2007 | 12:38 PM
  #7  
pony_killer95's Avatar
Thread Starter
Registered User
 
Joined: May 2007
Posts: 7
ok so pull a spark plug and if it is wet that means im getting fuel and no spark...
if that is the case should i be thinking opti or anything else
Old Jun 13, 2007 | 01:12 PM
  #8  
ZL1modified's Avatar
Registered User
 
Joined: Nov 2005
Posts: 646
From: PA
Originally Posted by pony_killer95
ok so pull a spark plug and if it is wet that means im getting fuel and no spark...
if that is the case should i be thinking opti or anything else
could be bad plugs (cheapest), wires, ignition coil, or Opti(Most Expensive)...

always start with the cheapest...
Old Jun 13, 2007 | 05:35 PM
  #9  
pony_killer95's Avatar
Thread Starter
Registered User
 
Joined: May 2007
Posts: 7
ok checked the plugs and they are wet...
i figure im going to have to replace the opti because the wires are about 15000 old and the plugs are about 5,000 old....
unless it could be something electrical that the comp would tell me...
so if i have to go for a new opti... whats the best place to get one and is there any good manuals online with picture of how to fix one step by step..?
Old Jun 13, 2007 | 05:48 PM
  #10  
ZL1modified's Avatar
Registered User
 
Joined: Nov 2005
Posts: 646
From: PA
i would recommend oem gm style... i been thru the whole accel thing...(not impressed)
i would check the coil befor you just go and buy a 300 $ part...
Old Jun 13, 2007 | 05:50 PM
  #11  
Injuneer's Avatar
Administrator
 
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Try checking the ECM for codes. You don't need a scanner on a 93.

http://shbox.com/1/dlc2.jpg
Old Jun 13, 2007 | 05:57 PM
  #12  
pony_killer95's Avatar
Thread Starter
Registered User
 
Joined: May 2007
Posts: 7
ok first how do i check the coil???
next i did not understand that link for the shoebox and how to check it? where is this exactly?
Old Jun 13, 2007 | 06:02 PM
  #13  
Injuneer's Avatar
Administrator
 
Joined: Nov 1998
Posts: 71,094
From: Hell was full so they sent me to NJ
Shoebox's (he's a person - probably one of the most knowledgable on this site) link tells you how to get the codes from your computer.

It tells you how to "flash" the ECM trouble codes on the SES light, by shorting the ALDL pins. Look at the column on the right labeled "Flashing DTC's".




All times are GMT -5. The time now is 09:00 AM.