idleing problem
07-27-2010, 03:21 PM
#51
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
Well, that brings us to the question: Are the fuel injectors firing? If the fuel system is holding pressure while the engine is being cranked, either you have a. fuel but no spark, or b. spark but no fuel injection. We can assume you have spark because the engine runs just fine on starting fluid, so that leaves us with not having fuel injection. Run the test light test again on the blue and green fuel injector wires.
Does that friend of yours have just a code reader or a full scanner? If they have a full scanner, look at the engine RPM while cranking. If the engine speed shows above 0, there are other problems. If the engine speed shows 0, you're running on base spark provided by the ignition module, and there is a problem between the ECM and the distributor. Check that both of the plugs in the black module in the base of the dizzy are plugged in, along with the 2-wire connector under the cap. The funny thing about our engines is that the ignition module actually runs the engine until engine speed reaches 400 RPM, when the ECM takes over. If you're putting starting fluid in the engine instead of fuel, this bypasses the ECM altogether if you're not getting fuel injection, and the engine will run like crap (because or minimum spark advance).
If you'd like, I can trade you an ECM and TPS for the fan and radiator mount.
Does that friend of yours have just a code reader or a full scanner? If they have a full scanner, look at the engine RPM while cranking. If the engine speed shows above 0, there are other problems. If the engine speed shows 0, you're running on base spark provided by the ignition module, and there is a problem between the ECM and the distributor. Check that both of the plugs in the black module in the base of the dizzy are plugged in, along with the 2-wire connector under the cap. The funny thing about our engines is that the ignition module actually runs the engine until engine speed reaches 400 RPM, when the ECM takes over. If you're putting starting fluid in the engine instead of fuel, this bypasses the ECM altogether if you're not getting fuel injection, and the engine will run like crap (because or minimum spark advance).
If you'd like, I can trade you an ECM and TPS for the fan and radiator mount.
07-27-2010, 06:58 PM
#52
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
i cant tell which injector is which, the lines are dirty and i cant get to them to clean them off, also if the car sits awhile an i try to start it it WILL start but dies shortly after. any help?
07-27-2010, 07:14 PM
#53
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Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: idleing problem
What I meant was to test the ground side of the fuel injectors by hooking the clamp end of a test light between the positive side of the battery (or the post on the back of the alternator) and the ground wires in the fuel injection harness, which are green and blue (power wires are pink). Crank the engine. If the light blinks, the ECM is providing a ground. If not, there is a problem between the injectors and the ECM.
You could have the ignition module tested by removing it from the distributor and taking it to AutoZone.
And the short burst out of the engine is an injector that's leaking and allowing fuel into the engine, probably. Check everything you can in the engine bay and otherwise for having gotten wet (if it's gone on long enough, there will be powdery green corrosion on the connector).
You could have the ignition module tested by removing it from the distributor and taking it to AutoZone.
And the short burst out of the engine is an injector that's leaking and allowing fuel into the engine, probably. Check everything you can in the engine bay and otherwise for having gotten wet (if it's gone on long enough, there will be powdery green corrosion on the connector).
07-27-2010, 07:25 PM
#54
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
wouldnt testing the harness be the same as testing the clip or cover that goes over the injector?, where isthe harness at to where i can hookup to this?
07-27-2010, 07:51 PM
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07-27-2010, 07:57 PM
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
also checked the two plugs on the dizzy, they are tight and nothing is lose, the only thin i havent checked is the ign module, i hate checking those. so far iv checked everything but the RPMS, any way i can test that without the scanner?
07-27-2010, 08:30 PM
#57
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Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: idleing problem
Did you want the ECM and TPS?
07-27-2010, 08:37 PM
#58
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
tach the RPM gauge?, and yes i have the fuel injs from the 90 i took the entire rail, but i REALLY dont want to take that upper plenum off again, i just replaced the gaskets on it
07-27-2010, 08:38 PM
#59
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
and no on the EMC and the TPS thanks anyways dan, iv i end up needing those ill let you know, i changed the ign module with a new one along with the roter button and the cap and still nothing....
07-27-2010, 08:39 PM
#60
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
could my problem from friday of caused this?, when ever i started the car and touched the gas it tried to die on me remember? could that cause anything.?
07-27-2010, 08:47 PM
#61
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
if the RPM gauge is my tach then yes it moves, it goes from zero to the next mark and holds while cranking.
07-27-2010, 09:54 PM
#62
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Car: 2003 Hyundai Tiburon GT
Engine: 2.7L V6
Transmission: 6-speed
Axle/Gears: 4.41
Re: idleing problem
You can swap the fuel injectors without replacing the intake gaskets 
. Just need a set of fuel injector o-ring seals. And don't lose the o-ring on the cold start injector tube as it's only found in an $8 set, most of which you don't need.
Clogged fuel injectors are nasty little buggers. No fuel means no go.
. Just need a set of fuel injector o-ring seals. And don't lose the o-ring on the cold start injector tube as it's only found in an $8 set, most of which you don't need.Clogged fuel injectors are nasty little buggers. No fuel means no go.
07-27-2010, 10:15 PM
#63
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
no post on the other info i posted? the problem from friday, the new cap, button, an ign module?/
07-28-2010, 02:22 PM
#64
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Car: 2003 Hyundai Tiburon GT
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Re: idleing problem
Like I said, clogged fuel injectors would be the next problem, or the fuel filter (filter first, though). If the injectors are clogged, they may barely put out enough fuel for the engine to idle. When the demand for fuel increases, they won't keep up and the engine will lean out dead. Try a fuel filter first to see if it's badly clogged, and if nothing comes from that, swap over the fuel injectors from the other engine.
07-29-2010, 04:06 PM
#65
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
im gonna change the fuel regulator first...if that doesnt work then the injectors are next, the filter is fine..
10-11-2010, 07:57 PM
#66
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
Well i changed the Cap, button, maf, vac lines, injectors, actually i replaced the entire fuel rail system, and still no go, my step dad thinks my timing has jumped so hes going to check that, should i go ahead and replace the fuel filter? its a fairly new one the PO put on not even 2 months before i got it. so after i check timing and if it still doesnt start what should i check then?
10-12-2010, 08:38 AM
#67
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Car: 1986 camaro Sports Coupe
Engine: L31 350
Transmission: 89 700R4
Axle/Gears: 3.42 gov lock
Re: idleing problem
im goin go try and adjust it by bringing it up to top dead center then checking my dizzy, it its off im going to try and adjust it by adjusting the dizzy if not, out comes the plate and in goes a new chain.
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