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Engine idles rough after timing chain replacement

Engine idles rough after I changed the timing chain but runs fine at higher rpm's

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 178 Answers

SOURCE: rough idle stalls at low rpm's

hello first check your idle with the car running foot on brake see were your rpm reading is if your below 500rpm check your label underhood for your curb idle setting second see if theres a adjustment screw you can increase were your gas cable lever rest against your set screw underhood if you feel confident enough remove your iac motor idle air control valve if the bore were the end of the pintle extracts out to close has varnish builup our carbon it will stick creating vacuum leak type senario causing stalling rough idle sometimes even no start conditions good luck

Posted on Sep 18, 2008

emissionwiz
  • 75077 Answers

SOURCE: engine runs rough at certain speeds 3.0 v6 flex-fuel 1999 ranger

Check and see if the EGR valve is leaking, to check this spray water on it at idle, if the water steams off the valve is leaking and is the source of your problem, also are you sure you hooked the new DPFE sensor up right? re-check it..

Posted on Nov 23, 2008

teezay731
  • 1 Answer

SOURCE: rough idle stalls at low rpm's

check your transmission fluid,the motor will stall when fluid is low

Posted on Mar 24, 2009

Deutsche
  • 17 Answers

SOURCE: 1991 VW Cabriolet runs rough during idle

Check the hose between the inletmanifold and the pipe to the brakeservo it normally gets old and a crack in so the engine sucks false air on cylinder 4, causing engine to run rough or uneven.

Posted on Apr 14, 2009

ourhowse
  • 2007 Answers

SOURCE: engine starts,reaches high rpm,then slowly returns

Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!

Posted on Jul 03, 2009

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Hi, if it sounds like a tractor and is feeling rough and less powerful than normal, my guese is the timing chain guide (possibly top guide) has come loose. If you can get van over a pit, on jack stands or on hoist and while engine is running, the noise will be louder at front of engine by the timing chain housing, you could also feel the guides rattling, hence the tractor noise. As the engine is revved to higher RPM's the chain vibrates faster and the guide is forced off the chain so the noise lesson's. Parts are available, but before ordering parts you will have to disassemble timing chain housing and check the guide bolt thread on engine side are not threaded, otherwise re-threading the hole and finding the right bolts to fit guide plates can be a nightmare, but you can use helicoil, which expensive but effective. Check also the housing, it may have wear marks due to guides rubbing on it which is not a problem, but as oil circulates through it you wouldnt want it to leak out.
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I replaced the timing chain in a 2005 potiac sunfire with a 2.2 and now it run rough but runs fin going down the road but idling it run rough and sometimes will die


if the car ran fine befor you changed the timing chain you may have the cam timing off by one tooth retarted. Being the PCM controls the timing advance . The engine smooths out at higher speeds .Start back tracking and looking at the simple stuff . but you may have to pull the timing housing again to check the timing marks on the cam and the crank

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Engine starts,reaches high rpm,then slowly returns to a rough idle, misses badly,no backfire,surges as if searching/adjusting air/ fuel/est,timing light shows mark constantly changing/erratic,engine then...


Vacuum leaks. Check all hoses and intake bolts. Leaking EGR or plugged PCV valve. Air filter plugged. Leaking head gasket. Worn timing chain. Camshaft lobes worn. Valves burned or leaking. Fuel idle control system or sensor. Good luck!

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Rough idle stalls at low rpm's


check your transmission fluid,the motor will stall when fluid is low

Dec 06, 2008 | 1996 Jeep Grand Cherokee

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