- #1285 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [barouk]
by tsurnick
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Sep 23, 2008 (3:11 pm)
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Replying to: barouk (Sep 23, 2008 2:57 pm)
you may want to try some liquid wrench. saturate all around the bolt and let it stand for a while before trying it again. hopefully that will work.if they do break, you can get a set of bolt outs (they are kind of like drill bits that go backwards.) lowes may have them if the parts store doesnt. i have my parts store on speed dial for reasons such as that. usually those guys are pretty smart.
Thanks and i hope that helps
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- #1286 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tsurnick]
by tuscanskipper
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Sep 27, 2008 (3:15 am)
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Replying to: tsurnick (Sep 23, 2008 2:47 pm)
I agree with the advice about the bolts.
You will need a plenum gasket, manifold gaskets and the two fuel rail gaskets. I would also recommend a thermostat housing gasket. Also if you can get one, a gasket for the heater hose outlet on the back of the manifold. I could not find one of those, so if you break it you will have to make one, likely.
I would recommend not decoupling the fuel rails, as you may do damage it will be hard to repair. You will have to remove the fuel rails. I would recommend removing the thermostat housing so you can set them to one side, without decoupling them.
Getting the old gasket off is hard. I polished all surface with the small Scotch Brite pads on my small air angle grinder.
It is fiddly to keep the manifold and fuel rail gaskets in place. You will need something sticky to hold them. I used a product called form a gasket. I also put a bead of blue RTV sealant round the waterways.
Sorry for the late reply, but I'm visiting England currently.
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- #1287 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tuscanskipper]
by tsurnick
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Sep 29, 2008 (2:38 pm)
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Replying to: tuscanskipper (Sep 27, 2008 3:15 am)
I finally went and did it. I replaced the Intake gasket, the valve cover gaskets and the thermostat housing gasket. no leaks. I have another problem now. the idle is fine unless you put the car in gear, then the idle either drops to about 600rpm or the car dies all together. I cant seem to find any vacuum hoses that are loose or anything. any ideas? otherwise, the car seems to run fine. it hovers right around 1000 rpm normally till,like i said, you put it in gear.
??????????????????????
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- #1288 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tsurnick]
by tuscanskipper
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Sep 29, 2008 (3:23 pm)
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Replying to: tsurnick (Sep 29, 2008 2:38 pm)
Have you checked the codes? Is there a problem with the idler motor or circuit? Unfortunately, I think you still have an intake leak. It should not idle at 1000 RPM when not in gear. It should be 750 to 800. It should drop back to around 700 to 750 in gear.
Did you get all your surfaces clean? Are you sure you have not had a gasket slip on reassembly? I think one of these two things is likely the issue. Try squirting carb cleaner in all ares of the replaced gaskets, and see if idle increases. I do believe your repair was not properly carried out most likely.
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- #1289 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tuscanskipper]
by tsurnick
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Oct 03, 2008 (6:16 pm)
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Replying to: tuscanskipper (Sep 29, 2008 3:23 pm)
the idle was more around what you said it should be. It idles around 850 normally. I have checked the gaskets and every other area that i did. I was on another website which i think it was Justananswer.com where you can chat with an actual mechanic. He had me try several things and the last thing he had me try was to take the big vacuum hose off that comes from the plenum to the Brake booster. He said pull it off at the plenum and cap it. he said sometimes the brake booster goes bad when the car is that old (94) and it leaks vaccuum. when it goes bad it takes away vacuum from the motor when you push on the brakes. when i did what he said and then put the car in gear and pushed on the brakes the idle stayed the same instead of dying or dropping idle. it worked. but one thing i hadnt done was let the motor warm up when i did that test. It seems that 1. the engine has to be warm 2. you push on the brakes for more than about 20 seconds like you are stopped at a long light. i was at starbucks getting a frappachino and it almost died in the line. I am puzzled. it runs fine when i am driving around and when i have it in park and neutral. I had a mechanic friend of mine check it out and he did find a vacuum hose that was bad and replaced it. it still has the same problem.
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- #1290 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tsurnick]
by tuscanskipper
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Oct 03, 2008 (10:06 pm)
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Replying to: tsurnick (Oct 03, 2008 6:16 pm)
Have you checked the idler solenoid codes? The idler bypass solenoid should stop this stall.
You can check codes from the ignition switch. Turn the switch on, off and then on fairly quickly, and count the flashes from the check engine light. A series of two sets of five flashes in a row, is 55. That should always be the only code, unless the battery was recently disconnected and you will get a one two flash, which is 12, and then fifty five. Any code flashed before 55 code is a fault code.
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- #1291 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tuscanskipper]
by tuscanskipper
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Oct 03, 2008 (10:15 pm)
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Replying to: tuscanskipper (Oct 03, 2008 10:06 pm)
One other thing. Did you resynchronize the throttle bodies after re installation?
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- #1292 of 1361
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Chrysler LHS Over Heating Now
by tsurnick
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Oct 13, 2008 (1:24 pm)
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I just got everything else repaired and now the LHS started overheating today. One thing i dont like about this particular vehicle is the cooling system. it has one of those self contained radiators that doesnt have a cap on top of it. the overflow tank is near the firewall on the passenger side. I have recently replaced the thermostat. ( I had to take it off when I replaced the intake manifold gaskets). what should i check first on the cooling system. We actually changed the fluid about 3 months ago. What is a good way to tell if the radiator is clogged?
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- #1293 of 1361
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Re: Mystery of the rough idle on the Chrysler 3.5 V5 solved! [tuscanskipper]
by tsurnick
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Oct 14, 2008 (6:17 pm)
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Replying to: tuscanskipper (Oct 03, 2008 10:15 pm)
Yes, I did Sync the throttle bodies. everything seems to have worked itself out. Please see my other post about the cooling system. Any info would be good
Thanks
Timothy
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