2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

A couple easy questions...

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Old Jan 1, 2003 | 05:03 PM
  #26  
QuantumDuck's Avatar
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From: Ohio
Right now the air box is completly disconnected at the air funnel..How would that effect the afm?

btw...the everything was intact when the problem started...
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Old Jan 1, 2003 | 07:31 PM
  #27  
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HAILERS
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So maybe I got it all wrong. I understand it starts, goes to fifteen hundred and then dies.

This is a different tack. It sounds like its not getting fuel. The fuel pump turns on, at the beginning, when you hold the key to START. The engine starts and you let the key go to ON. When you let the key go to ON, the fuel pump circuit then depends on a circuit thru the air flow meter to keep the fuel pump running. If that circuit is not working, then the car dies of fuel starvation.

So it could be that the circuit thru the air flow meter is kaput. You can bypass that circuit through the air flow meter and prove this is the problem or not.

Near the right front strut tower, close to that rectangular, black pressure sensor, is a yellow, two socket plug. Might have a black cover surrounding it. Its not connected to anything. Just lies around loose.Its called a *fuel check connector*. If you jumper the two sockets with a piece of wire to make a circuit, the fuel pump will work even if the key is to the ON position and not the START position.

So, jumper that connector, jump in the car, and start the car. If it still goes just to fifteen hundred and dies.......well thats not the problem then.

Make sure that electrical plug is connected to the afm all the time.

I know you said somewhere above the car floods, but the thing has all the characteristics of a starving engine OR one real big air leak. Not some puny vac hose, but some half inch or larger hose.
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Old Jan 1, 2003 | 07:52 PM
  #28  
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From: Nashville, TN
Originally posted by HAILERS
It sounds like its not getting fuel. The fuel pump turns on, at the beginning, when you hold the key to START. The engine starts and you let the key go to ON. When you let the key go to ON, the fuel pump circuit then depends on a circuit thru the air flow meter to keep the fuel pump running. If that circuit is not working, then the car dies of fuel starvation.

So it could be that the circuit thru the air flow meter is kaput. You can bypass that circuit through the air flow meter and prove this is the problem or not.

Near the right front strut tower, close to that rectangular, black pressure sensor, is a yellow, two socket plug. Might have a black cover surrounding it. Its not connected to anything. Just lies around loose.Its called a *fuel check connector*. If you jumper the two sockets with a piece of wire to make a circuit, the fuel pump will work even if the key is to the ON position and not the START position.

So, jumper that connector, jump in the car, and start the car. If it still goes just to fifteen hundred and dies.......well thats not the problem then.

Make sure that electrical plug is connected to the afm all the time.
i dont think its a fuel problem. if the fuel pump is pumping, (even for a few seconds while you're cranking it,) there will be fuel in the fuel lines. if all that fuel line is filled up with fuel, it has enough juice to run for about 3 seconds before it starves and dies.

this dude is saying that right when he cranks it up, it fires, vroooms up to 1500, then dies. when i cut the fuel when my car is running (via a fuel pump cutoff switch) the car will still run for about 3 seconds. then it will cough for a second and die.

bottom line is there should be enough fuel in the fuel lines to keep the car going for atleast 3 seconds after it starts.

BTW, my car was doing the EXACT same thing when i had one of the big hoses on my intercooler not tightened down good (actually it wasnt tight at all) creating a huuuge vacuum leak.
ALSO, my car did this a couple times when i left my AFM unplugged. (but i'm assuming you've already looked into that)
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Old Jan 1, 2003 | 08:09 PM
  #29  
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HAILERS
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From: FORT WORTH, TEXAS,USA
I'll go along with JACOBCARTMILL on that. That's a good possibility. Except you have a n/a, but the principal is the same. It wouldn't be some small puny vac hose, but one of half inch or large diameter being off. One possibility is the half inch dia hose at the bottom of the inlet duct, about six/eight inches before the throttle body. On the bottom of the duct. Should run from there to a metal pipe that runs behind the throttle body on a n/a.

Or the plug is off the afm. Or the intake duct is disconnected b/t the afm and throttle body. Or..........
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Old Jan 2, 2003 | 03:54 PM
  #30  
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From: Mississauga
Originally posted by QuantumDuck
Right now the air box is completly disconnected at the air funnel..How would that effect the afm?

btw...the everything was intact when the problem started...
Not sure what you mean by the air funnel but you need the airbox connected to the throttle body for the car to run. If you are running it with out the airbox and without the big aluminum box attached to the airbox then it will never run. The airbox has to have an airtight connection to the throttle body.

The problem sounds exactly like an intake leak to me. Do you have to floor the throttle for it to rev to 1500 rpm and die?
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Old Jan 2, 2003 | 09:32 PM
  #31  
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From: Ohio
jacobcartmill said....'this dude is saying that right when he cranks it up, it fires, vroooms up to 1500, then dies. '
thats as close as anyone has gotten so far in describing the problem...except it doesn't exactly vrooom up to 1500...it kinda chugs and coughs it's way up there and then dies...

Jahoo88 is also correct...in order for it to hit 1500 I have to floor it, if i don't, it hits just inder 1000 before sputtering and dieing...

After trying to get it started, but before it floods out, I can pull the plugs and they are pretty wet with gas, so I don't think fuel starved is the problem...

I think I'm gonna see what I can see about the AFM...

In case I haven't said it before...thanks alot guys, I really appreciate everyones help with this...

Last edited by QuantumDuck; Jan 2, 2003 at 09:34 PM.
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