Question about 1999 Ford Crown Victoria

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1999 Crown Vic. Check engine light was on. Difficult to start and wouldn't hold its idle. Took at least 15 minutes of idling before I could put it in gear. Codes indicated cylinders 1 and 6 misfiring, inspection revealed intake manifold gaskets needed replaced. Replaced gaskets, changed spark plugs. Still misfiring. Replaced coils. Car was fine then for the next 50 miles or so. Then started again with losing its idle right after start up when put into gear and running very rough like the engine was fighting acceleration. What am I missing?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 69 Answers

SOURCE: P0304=misfire in cylinder 4. coil?

not coil coil it wouldnt fire at all it is either a plug or a wire replace the wire and plugs and that will fix it

Posted on Oct 06, 2008

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  • 261 Answers

SOURCE: Ford Crown Vic p0300 random cylinder misfire

take a look at the EGR valve it could be either vacum controlled or electronic either way what seems to be the problem is that the valve is stuck in the open position until the engine warms up you can gently tap the egr valve with a small hammer or a screw driver and you can see that it runs smooth, now if the egr valve is vacum controlled replace the valve. if it is electronoc controlled replace the valve and the module for the egr valve.

Posted on Nov 24, 2008

emissionwiz
  • 77202 Answers

SOURCE: TEMPUTURE SENSOR BLEW OUT

I worked for a Ford dealer for 20 years, it is not a common problem, but it does happen, the recall was for coolant leaks at the molding seams of the manifold, I did almost all the manifolds that came through the door on the Mercure and Ford models that used a 4.6L V8. Your manifold can be repaired.

Posted on Dec 07, 2008

  • 99 Answers

SOURCE: Check engine light comes on. p0171 and p0351 codes found

From Lusty Kid:

I know the economy is bad, but change all of the plugs. Check your PCV Valve hose, 150 rottens them out allowing air to be sucked in, thus all kinds of codes.

Depending on mileage. Dismount the EGR valve and clean passages. If you are really good dismount the throtle position sensor body and clean out passages with Choke Cleaner., dismount where the EGR valves connects to the engine, clean out passages. Also check the hose thats behind this mounting to ensure is not clogged. If clogged clean it out. If not replace it. Is about 1.5 ft. long, connects to the PCV Valve Hose.

When is the last time you change your harness. Can't remember??? Replace it. Good Luck

Posted on Dec 26, 2008

  • 4 Answers

SOURCE: intake manifold installing..... difficult?

i replace the intake manifold on my 98 crown vic . its was easy just take your time take pictures. the hardest part for me was two bolts in back of the heads facing the firewall once you get those it quite easy after that. plus you save your self a least 500.00 dollars. good luck

Posted on Apr 27, 2009

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