3.1L cranking, but not starting, completely lost
3.1L cranking, but not starting, completely lost
I'm going to start with saying that I got this car late January so I am new to it.
About two months ago I was replacing spark plugs and snapped the old bolts on exhaust manifold, connecting the EGR valve. So i decided to just remove the EGR valve and the smog pump. Got cover plates and a new pulley to replace the smog pump, but when I tried to start it it would crank but not start. I've been confused since because nothing else has changed other than new spark plugs, spark plug wires, and ignition coil, and the removal of the emission stuff.
Since then, trying to get it started, I've replaced the ignition control module, fuel pressure regulator, replaced the entire starter, checked all fuses and injectors, and made sure the battery is charged but it still cranks, making the same noise and not starting.
If you all have any ideas, it would be appreciated.
About two months ago I was replacing spark plugs and snapped the old bolts on exhaust manifold, connecting the EGR valve. So i decided to just remove the EGR valve and the smog pump. Got cover plates and a new pulley to replace the smog pump, but when I tried to start it it would crank but not start. I've been confused since because nothing else has changed other than new spark plugs, spark plug wires, and ignition coil, and the removal of the emission stuff.
Since then, trying to get it started, I've replaced the ignition control module, fuel pressure regulator, replaced the entire starter, checked all fuses and injectors, and made sure the battery is charged but it still cranks, making the same noise and not starting.
If you all have any ideas, it would be appreciated.
Joined: Dec 2004
Posts: 16,694
Likes: 979
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 3.1L cranking, but not starting, completely lost
With the part canon fired, what’s missing? Fuel pressure? Injector pulse ? Spark ?
fire off with starting fluid
fire off with starting fluid
Re: 3.1L cranking, but not starting, completely lost
Effectively yeah, just replacing things that might cause it to not run, even if not broken a lot if those parts were original and starting to wear out. Only things missing/taken out after everything was the EGR and smog pump, and from what i've read those won't stop it from starting. I've tested the spark plugs and all 6 are getting power, but haven't checked the fuel pressure yet. I also don't know about the injector pulse yet. I'll probably attempt to start it with starting fluid, see if I can get any error codes from the car.
Joined: Dec 2004
Posts: 16,694
Likes: 979
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 3.1L cranking, but not starting, completely lost
Effectively yeah, just replacing things that might cause it to not run, even if not broken a lot if those parts were original and starting to wear out. Only things missing/taken out after everything was the EGR and smog pump, and from what i've read those won't stop it from starting. I've tested the spark plugs and all 6 are getting power, but haven't checked the fuel pressure yet. I also don't know about the injector pulse yet. I'll probably attempt to start it with starting fluid, see if I can get any error codes from the car.
Re: 3.1L cranking, but not starting, completely lost
and plug wires are on the list of ammunition, , , ,
It turns out to be a messed up firing order....
Last edited by OrangeBird; Apr 20, 2025 at 05:49 PM. Reason: Damn Typos......
Supreme Member

Joined: Jan 2008
Posts: 1,328
Likes: 560
Car: 1986 IROC Z
Engine: 5.0 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
Re: 3.1L cranking, but not starting, completely lost
Squirt some gasoline into the air intake, crank the engine over and see if it momentarily fires. Report back with your results.
Re: 3.1L cranking, but not starting, completely lost
I followed the distributor diagram when plugging the wires back in, but at this point just thinking the entire timing is somehow messed up, know it has good fuel, and oil pressure, and the spark plugs are actually sparking
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