i have an 2.8 v6 from 1987) it has bin stocked for 6 years. the engine cranked but didn't start. after done a bit of research i found out the fuel pump was bad. i changed the fuel pump and the engine starts :-)
but the problem is , it's just like the engine runs on 3 cilinders , it's just a tank , stuttering, no power, i checked the ignition and i have sparks on al 6 plugs , the timing is also good ; cilinder 1 stands on 10 degrees.(tested with strobolight) i saw thazt if we start the engine there came smoke from the exhaust manifold at the firewall side. if i step the gaspedal , the engine is about to fall still. i hear also a great air sucking noise at the bottom of the egr-valve. and i hear also a bang if i stopped giving throttle at the exhaust manifold at the firewall side.
what could this be? can anyone help me with this issue?
It sounds like a cracked EGR tube under the intake manifold. very common problem that creates a giant vacuum leak...Rodney Dickman sells replacements...
You still may have low fuel pressure. Check to see using the little Shraeder valve on the fuel rail. I should be about 32 lbs. with the engine running. Also check for blockage in the exhaust system.
1. find the valve cover on the fuel rail...passenger side...see the link. 2. Turn key on, engine off....listen for fuel pump. 3. gather some rags and a fire extinguisher, put on safety glasses. 4. unscrew cover.....it looks like a bicycle tire air valve inside. 5. press that pin in the center with a screwdriver. 6. notice how high the fuel goes... it should hit the bottom of the deck lid. 7. Clean up the fuel. If the pressure was lower than the deck lid, get a gauge.
i think the previous owner had a problem with the fuel pressure cap or so . because where the cap supposed to be is a rubber line with a bold screwed in to lock it.
Mine ran fine before sitting 2.5 years. Now like yours, but can be driven. Try new gas and fuel additives. New air filter. Also clean intake. Try to keep it running. Probably better once warmed up.
My 85 GT that I bought a few months ago had sat for 2 years with a bad fuel pump. I dropped the tank and cleaned it and replaced the fuel pump. I put in fresh fuel along with a heavy dose of Lucas fuel injector cleaner. It ran very rough like yours when it finally started and I had to let it run for quite awhile before it started running smoothly.
My 85 GT that I bought a few months ago had sat for 2 years with a bad fuel pump. I dropped the tank and cleaned it and replaced the fuel pump. I put in fresh fuel along with a heavy dose of Lucas fuel injector cleaner. It ran very rough like yours when it finally started and I had to let it run for quite awhile before it started running smoothly.
[This message has been edited by vincent (edited 05-27-2014).]
it's a new fuel pump and i replaced the feul tank also.
i hope i gonna find the problem. i gonna check the valves. i gonna try another egr valve and i gonna borrow another egr tube to test. but after that i don't know anymore what to do. besides checking the fuel pressure and injectors. is there a easy way to test the injectors at home with no special tools?
