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89 pontiac bonneville 3.8, starts right up and runs fine if the startup is cold, turn it off for 10 or 15 minutes car spits sputters sometimes dies. wait till it cools down, fires right up. replaced egr,air idle, fuel filter,mass air flow,temp sensor. anybody
check the fuel pressure regulator pull off hose and if it smells like gas or has some gas in line replace itcheck the fuel pressure regulator pull off hose and if it smells like gas or has some gas in line replace it
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This can be caused by a problem in the fuel pressure check valve of the fuel pump. Have a pressure leak down test run by a shop, if the system is losing pressure then the pump assembly must be replaced. The fuel pump is located inside the gas tank and is electric
A common problem with Ford products built in the 1980s is the ignition module mounted on the distributor. You will need to figure out if it is a fuel problem or ignition problem to proceed.
Check the egr valve by located it and the vacuum hose connected to it. pull of the hose and check it for wear like cracks or hardening of the rubber. If it looks ok, reconnect it to the egr and start the engine while it is cold and with the engine idling, remove the hose from egr valve. If the engine sputters and then dies, pull off the vacuum hose one more time and try to start the car. If it runs fine with the hose disconnected, replace the egr valve.
Have you chg.fuel filter and had a fuel pressure test done? Does it have spark after it stalls? Fuel pumps are a common problem, they work when cold get warmed up they quit, after a while quit all together. Do the fuel pressure test.
Shell has had issues with contaminated fuel in the past cant recall what it was but it actually damaged the fuel pump. I hope thats not the issue here can get costly in some cases fuel pumps on GM are a whole assembly. DOes the gas gauge still read properly? This was a big tell with the contamination last time. Gauge would read empty even when full.
I just went through lots of troubleshooting and expense on my 1996. Whenever I would lift my foot off the accelerator and was below about 30 mph, the rpm's would starts jumping around and sometimes it would stall. If I gave it a little gas (accelerator), I could sometimes keep it running. It also backfired once in a while. Starts right back up. Also, if I let it idle while in part, it would die after 1-2 minutes.
I ended up finding a hole in the fuel regulator. About a ~$70 part if you get an AC Delco, but very simple to change.
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