scoobydoo73 Posted February 14, 2004 Report Posted February 14, 2004 Here is the short of the problem I am having with my 3.1 93 lumina. Started it outside of Sears and the spark plug went flying right out of the cylinder head. I am not far from home so I try and drive it home. It dies half way. I come back with a heli-coil and fix the problem. Now it starts for like 5 seconds and then just dies out. I think it might be a fuel problem but am wondering where to get a good fuel pressure tester for the fuel rail. I recently replaced the filter so I am thinking it is the pump or fuel pressure regulator or injectors. Also no trouble codes at all. Sorry for the long post. Any help is appreciated Quote
Slade901 Posted February 18, 2004 Report Posted February 18, 2004 I think it might be a fuel problem but am wondering where to get a good fuel pressure tester for the fuel rail. Well, if your fuel rail has a schader valve then you can just get a fuel pressure tester at your local Autozone, Advance Autoparts. Don't you think the fuel injectors might have been damaged as well when the sparkplugs went flying? Quote
scoobydoo73 Posted February 19, 2004 Author Report Posted February 19, 2004 Well my brother who used to own the car said this had happened before and was fine once he put the spark plug in with a heli-coil. I found a fuel pressure tester at sears so hopefully tommorrow i will be able to test pressure. If pressure is good I will probably pull the injectors. Quote
scoobydoo73 Posted February 21, 2004 Author Report Posted February 21, 2004 Fuel pressure came out to 39 psi on the fuel rail. A little low but I would guess it should still run with that much pressure. Would it be worth replacing anyhting to bring it back up over 40 or should I just pull the fuel injectors out. Quote
dbtk2 Posted February 21, 2004 Report Posted February 21, 2004 I think the problem I would worry about is why you have spark plugs flying out of your cylinder heads. Shawn Quote
Slade901 Posted February 22, 2004 Report Posted February 22, 2004 Fuel pressure came out to 39 psi on the fuel rail. A little low but I would guess it should still run with that much pressure. Would it be worth replacing anyhting to bring it back up over 40 or should I just pull the fuel injectors out. 39 PSI OK and should be within range. Check your catalytic converter for restriction. Overt time the catalytic converter becomes restricted and it makes the engine work harder to expel the exhaust gases pass through the catalytic converter. Internet egnine temperature will become too high and pressure will be too high. The piston would not hit your spark plug nor fuel injector as it can't reach that far. It might hit the valves. Too much pressure in the piston chamber was likely the cause for your spark plug to fly out. Quote
scoobydoo73 Posted February 22, 2004 Author Report Posted February 22, 2004 It is very unlikely to be the catyletic convertor. I had a new one put on about 6 months ago. I am going to pull the intake, at least I can clean it while it is out and look at the injectors. If all doesn't work out I will just have it towed to a garage. Quote
913_4se Posted March 2, 2004 Report Posted March 2, 2004 did you get this thing fixed ? might try a CAS crank angle sensor if every thing else checks out but only if you loose spark i guess just thinking too hard Quote
Slade901 Posted March 2, 2004 Report Posted March 2, 2004 Crank Angle Sensor The Crank Angle Sensor (CAS) is a device commonly found inside the distributor which determines when each cylinder is on its compression stroke and sends pulses to the ECU for the correct ignition advance, measurement of RPM and triggering of the injector and ignition coil. http://www.motorista.com.ph/highgear/fyi.html http://www.hitman.hm/installation.htm You might be having a timing problem. Usually the camshaft gears wears out and timing chain get stretched out over time and causes this timing problem. Even if you have a Electronic Ignition timing, it would not do good if the camshaft gears, crankshaft gears are worn out or the timing chain get stretched out. Other engine uses timing belt in addition to timing chain. The timimg belt gets stretched out faster that the timimg chain. Quote
Guest Gp crazy Posted March 2, 2004 Report Posted March 2, 2004 check the compression across all the cyl's write all the psi they should not vary more than 10 -20 %. you may have a low cam lobe that isint opening the valve all the way or not at all. that would cause to much psi and blow the plug out. just a thought 8) good luck Quote
GRANDFURY Posted March 3, 2004 Report Posted March 3, 2004 So do our cars have a CAS, we gots no distributors. Quote
913_4se Posted March 4, 2004 Report Posted March 4, 2004 Crank Angle SensorThe Crank Angle Sensor (CAS) is a device commonly found inside the distributor which determines when each cylinder is on its compression stroke and sends pulses to the ECU for the correct ignition advance is that not a disributor module just guessing Quote
913_4se Posted March 4, 2004 Report Posted March 4, 2004 just one other thing there are two CAS on some cars one for the crank and one for the cam Cam Angle Sensor some newer only have the cam one im not sure what ones do and dont i know the 3.1 and 3.4 have a CAS the local auto shop will call the one for the crank a CRANKSHAFT POSITION SENSOR On your 1993 PONTIAC GRAND PRIX, the CRANKSHAFT POSITION SENSOR is: UNDER HOOD, PASSENGER SIDE, LOWER ENGINE AREA, PASSENGER SIDE OF ENGINE BLOCK, MOUNTED FRONT OF CRANKSHAFT PULLEY part # AC-DELCO 213-148 1 YR $12.99 Quote
Slade901 Posted March 4, 2004 Report Posted March 4, 2004 Since most of our cars don't have a distributor, it is using a Crankshaft Position Sensor (CPS). Newer cars implement both Camshaft Position Sensosr (CPS) and Crankshaft Position Sensor (CPS). Quote
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