Will not start
#1
Will not start
Little embarrassed.
Rebuilt 1972 Oldsmobile 350 engine in 2004. Mild cam, double Springs, roller tip rockers, Edelbrock RPM Performer intake, 650 Holley carburetor, switched to HEI distributor. Started engine right away in frame. After newly painted body was installed on frame; funds dried up. Decided to put money into car again. Wife said I had to start engine prior to this.
Attempted starting multiple times this past week. Pulled distributor and primed oil. Distributor re-installed. Starter rolls motor over. Has gas, has fire. Set #1 cylinder on TDC compression stroke although for some reason mark on harmonic balancer 180 off. WILL NOT START.
150# compression on all cylinders.
Tried starter fluid. I am at a loss. Ideas please!
Rebuilt 1972 Oldsmobile 350 engine in 2004. Mild cam, double Springs, roller tip rockers, Edelbrock RPM Performer intake, 650 Holley carburetor, switched to HEI distributor. Started engine right away in frame. After newly painted body was installed on frame; funds dried up. Decided to put money into car again. Wife said I had to start engine prior to this.
Attempted starting multiple times this past week. Pulled distributor and primed oil. Distributor re-installed. Starter rolls motor over. Has gas, has fire. Set #1 cylinder on TDC compression stroke although for some reason mark on harmonic balancer 180 off. WILL NOT START.
150# compression on all cylinders.
Tried starter fluid. I am at a loss. Ideas please!
#3
Sputtered, attempted 180 out and still nothing. Rotated distributor advanced and retarded. Verified 18436572 counterclockwise Nothing. ???
#4
Connect a temporary jumper 12ga wire direct from the battery to the HEI B+ terminal. If it sputtered your close, with an assistant operating the ignition turn the distributor slowly back and forth 1/4 turn. Do not flood the engine by pumping the gas pedal. To turn the engine off you must remove the jumper.
#5
Connect a temporary jumper 12ga wire direct from the battery to the HEI B+ terminal. If it sputtered your close, with an assistant operating the ignition turn the distributor slowly back and forth 1/4 turn. Do not flood the engine by pumping the gas pedal. To turn the engine off you must remove the jumper.
#10
#11
Back to basics.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
#13
Back to basics.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
Odd thing is... engine started previously.
#15
Unless you completely misaligned the timing marks, this will not prevent it from starting. The cam might be off a degree or two, which MIGHT affect ultimate power, but certainly won't prevent it from starting. This is not your problem.
#16
Did you install the timing chain that is roller with the advance/retard marks. It is very easy to confuse the 0 timing mark with the advance/retard ones on the bottom gear. Bought a Corvette once that would not start because the owner had done just that. Realigned the proper marks and it ran like a champ.
#17
He has 150# compression on all cylinders. If the camshaft timing was off very much, I don't think he would have that kind of compression. He has compression and gas. That only leaves one thing. Timing has to be out of whack. JMHO.
#18
my two cents.
you say you have spark, but....
check the HEI. if the ECM is bad it would cause a no start condition.
(ECM is the flat module on the distributor base with 2-prongs on each end and is screwed to the base.)
next try the HEI coil to see if it needs replacing.
i asuume all plugs are gapped?
you say you have spark, but....
check the HEI. if the ECM is bad it would cause a no start condition.
(ECM is the flat module on the distributor base with 2-prongs on each end and is screwed to the base.)
next try the HEI coil to see if it needs replacing.
i asuume all plugs are gapped?
#19
Just to avoid confusion, the thing inside the HEI is an ignition module, not an ECM. An Engine Control Module is a far more powerful computer that accepts sensor inputs (RPM, throttle position, manifold absolute pressure, gear selected, etc, etc) and uses this info to determine and control fuel map and ignition timing. The ECM will also control secondary functions like emissions controls, A/C compressor clutch, and idle speed. The ignition module is simply an electronic version of points that reads the Hall effect sensor in the distributor and uses a solid state relay to trigger the coil. There is no processing, just switching.
#20
Installed a new Proform Module and Coil, checked and have fire at plugs (AC DELCO R46SZ gapped 60 thousands). Unsure if adequate fire for compression. With fire I assumed coil was good.
Last edited by rickbmac; August 7th, 2017 at 11:05 AM.
#21
Back to basics.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
First, you DID confirm you are at TDC on the COMPRESSION stroke, right? Pulled the no. 1 plug and verified compression as you bump the starter around to TDC? Second, you DID confirm firing order is CCW, right? Third, you can check timing with a timing light while the engine is cranking, even if it doesn't start. Fourth, fill the carb through the vent port to get fuel in the carb before trying to start.
#22
#23
So long as there is spark, a timing light will work whether the engine is running or just cranking on the starter. Be sure your battery is fully charged when doing this, however.
#24
Believe it or not, went out to the garage tonight, removed charger from battery and attached cables, pumped the throttle 3 times and held at 1/4 open. Darn engine started right up. Going to take to the local exhaust shop and have dual exhaust installed.
I wanted to have 3" installed, but shop said 2-1/2" was all I needed and room is limited for 3". Thoughts?
After exhaust is installed I will tune.
I wanted to have 3" installed, but shop said 2-1/2" was all I needed and room is limited for 3". Thoughts?
After exhaust is installed I will tune.
#27
Heads shaved block decked, think I am close to 10:1.
Have original harmonic balancer. Believe it must have spun on center as when on TDC #1 Compression Stroke... timing mark is at approximately 7oclock rather than 1oclock (standing in front of car) Time for new balancer.
Have original harmonic balancer. Believe it must have spun on center as when on TDC #1 Compression Stroke... timing mark is at approximately 7oclock rather than 1oclock (standing in front of car) Time for new balancer.
Last edited by rickbmac; August 8th, 2017 at 02:52 AM.
#28
hey Rick
I used this one on my 455 it seemed like a good unit for the price i have no complaints w it.
http://www.rockauto.com/en/moreinfo....217472&jsn=485
I also have a good used one if you want it pay for shipping and its yours.
I used this one on my 455 it seemed like a good unit for the price i have no complaints w it.
http://www.rockauto.com/en/moreinfo....217472&jsn=485
I also have a good used one if you want it pay for shipping and its yours.
#31
When it started, it was momentarily. I shut engine down almost immediately. That time I had disconnected the electric Holley blue pump and just pumped throttle 3 times and opened 1/4. Engine has a Holley 650 DP. The next time I hooked pump back up. I have a regulator between pump and carb.
#35
Three pumps is probably too much with that carb. Make sure your timing is set to at least 16* BTDC and as stated earlier in the thread can be done while cranking. Also make sure you have full battery voltage to the distributor. even if you need to run a temporary jumper direct from the battery. Just remember to stop the engine you must remove the jumper. If you have a tach connected disconnect it for now. Once its running double check the timing and adjust your carb. On a side note, your pictures show the manual choke all the way closed, make sure the lever is in the position where its all the way open.
#37
Verified 12.6 volts at distributor.
Installed distributor 180 degrees out, the 1 tooth before and then 1 tooth after just as test. No luck so installed distributor in correct position.
Harmonic balancer bad so I have no bench mark to verify timing other than setting on number 1 cylinder compression stroke TDC.
Installed carburetor 10 years ago directly out of box assuming presets correct. Engine started then and there has been no changes to setup other than I pulled the distributor to prime the oil pump. And 10 years.
I am at a loss?
Installed distributor 180 degrees out, the 1 tooth before and then 1 tooth after just as test. No luck so installed distributor in correct position.
Harmonic balancer bad so I have no bench mark to verify timing other than setting on number 1 cylinder compression stroke TDC.
Installed carburetor 10 years ago directly out of box assuming presets correct. Engine started then and there has been no changes to setup other than I pulled the distributor to prime the oil pump. And 10 years.
I am at a loss?
Last edited by rickbmac; August 17th, 2017 at 06:31 PM.
#38
Friend stopped by this morning. Turns out that all that I needed was an extra set of hands. He turned the key while I operated the throttle. Started right away.
Last edited by rickbmac; August 19th, 2017 at 09:16 AM. Reason: Remove emoji
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