Western Branch Diesel Charleston Wv
Cause you heard it run when you yanked out the donor vehicle? Incidentally a SBC will not run if it looses spark to 3 or more plugs. 7 vortec engines are durable and reliable, as well as being easy to repair and improve on the whole. So it wasn't very long ago I finally got my FJ40 (has a 5. The truck is a 98 gmc 5.
What happens if you use starting fluid? Wait awhile, then try it again. Any help is greatly appreciated. He says they do it to get them to run so they can pull them in the garage to swap pumps. I'm wondering if the injectors are simply not opening (stuck) despite the signal. 5.7 vortec no start has fuel and sparkfun. I guess this explains why it ran great and then wont start the next day after all the replacements. Oil pressure switch. Let me know if the module changes it. I have confirm spark all the way around even put on another new coil just in case other was weak, getting 61 psi fuel pressure, it is holding pressure at 55 for more the 5 min, pulled and check dist, cap and rotor, reset engine to TDC reinstalled dist cranked it over and reset engine to TDC rotor is back at # 1 cyl, so do not believe it jumped timing. You can find out what your truck uses by looking in the repair manual.
On another note, I have been looking into gettting myself a scanner, but wouldn't know how to use it. And since I never heard the old motor run, it's making me think it might be something else wrong. If i have jumped time do you think i have damaged anything. You are obviously loosing one of the 4 basics needed to run an about the ignition module? I can't believe it lol.
I've read the L31s are prone to not start when left sitting too long and the injectors are to blame. But it can't hurt... 5.7 vortec no start has fuel and spark used. This truck does have a Mass Airflow sensor (MAF) so the engine computer does have to read the correct amount of air coming into the engine using the MAF. So looking for some advice on what to check for. If the spark plug is worn out, damaged, or fouled, it can lose its ability to generate a spark. Boneyard guys swear that all these FI motors sit a few yrs maybe 2 in 20 start, the rest need a bit of fuel to go.
I am completely unconvinced that replacing the spider assembly will cure the problem, that being that the fuel pump does not come on for the "run" phase. Engine Cranks Over but No Start?: I Have the Truck Listed Above. Oh ok well I guess that check is also the the same as checking the injector pulse. Refilled the gas tank a day before. Spark will take the path of least resistance so even if the plug is seen to spark out of the engine as soon as it is subjected to cyl pressure, the spark will escape from a deteriorated plug wire or cracked dist cap. Spark plugs are not old but look black when checked.
For example, once I saw the weak spark on a known good spark plug, I could've just called it a cap and rotor, but what if it was the coil that was producing a weak spark? Ready to take it to dealer just wanting to see if anyone else has any ideas. And it used to be that you could get individual injectors thru gm and only replace the ones that are stuck, however you are much better off upgrading to the multec style kit that is available to eliminate these issues all together. Even with the cam timing off a tooth or so the engine will still start, it just may run poorly and set the engine light with a P1345. From here you have a few possibilities left. 7 Vortecs, a 1996 4. While cranking with a spark plug in the coil wire you have continuous spark? If someone lays down by the fuel tank, the pump runs initially, but it does not operate for the "run" phase of the operation. Out it would still provide a backfires which would indicate fuel and spark. He says it does this as a safety so that if the motor stops running with the key on, you don't continue pumping fuel. My next move will be to drop the tank and replace the pump. 97 5.7 Vortec won't start. Just thinking of what it could be.. |12-18-2011, 12:07 AM||# 10|.
What I would do next is pull the upper intake off, plug all fuel lines and wiring back into the spider, pull the nozzles out of the lower intake and let them lay on the lower, unhook the coil wire, put on the eye protection and observe the system as someone cranks it over. That tends to sound like a possible circuit fault somewhere. An accurate repair can then be done once the issue has been pinpointed. I have check all the grounds they are good even recleaned surfaces for good contact as well. 7 tpi auto will not start. 8. 5.7 vortec no start has fuel and spare parts. ok here is another question my distributor is loss and was loss do you think it could have come off the cam gear and then fell back in place or do you think my chain has jumped truck only has 148K on it its hard for my to believe the chain has jumped. He thinks this pulse train is not getting to the ECM, so it never re-energizes the fuel pump relay. I think I got a faulty ICM at this point I pulled the plugs and 3, 5, 6, 8 all smell of heavy fuel. That's correct, ICM is good, coil is good, distributor is good, new plug wires and spark is good through plug wires and plugs. I have the truck listed above 1500 model with the first gen throttle body injection. What can cause this to happen?
Make sure to match the positive lead to the positive coil and the negative lead to the negative coil if this is marked on your ignition coil (some coils have two pins with no markings). I pray not, since that is a highly complicated system to deal with. Here is a post with picks: Also note that your timing is not adjustable on these engines. Most often, these are bolted to the spark plugs or mounted on top of the engine. Ground the plug btw. 1998 K1500 Vortec starts but won't run -- help. 1998 K1500 Vortec starts but won't run -- help! The engine started right back up on sunday. I have got the parts from a local pick n pull including ignition coil, crank sensor after looking at 25 vehicles I found 1 so seems to be problematic, cam sensor or ignition pickup from inside distributer, and ignition componet that is mounted to the same bracket as the coil connected to the heat sink.
Any vacuum leaks past the MAF can result in an engine not running To its full potential. So I'm firing completely on all cylinders and am immediately shooting flames out the throttle body. I decided to check the coil and to see how far the spark jumped out of it. Pulled #1 plug and checked spark, had nice spark. I realize you can use the Modus to do the pressure drop test, and you can set it lab scope mode and check the signal going to the assembly. Not too much slack and had not slipped. Thanks in advance for taking a look. I do notice it is really loud. Hope that does the trick. Problem started when i started truck up the other morning drove 1/4 of a mile and it died and wouldn't start back. It works perfectly, and the contacts are making contact internally. 7L - Cranks, No Start, Weak Spark.
This is a quick maybe 5 min test that will tell you not only if any are stuck but which ones.
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