Mechanics

TRYING TO FIND REASON FOR CAR DYING AT INCONSISTENT TIMES AFTER REPLACING PLUGS AND WIRES.

2000 Ford Focus • 130,000 miles

2000 Ford Focus SE, 4 cyl - A few weeks ago engine light came on. Check the codes, it was for a mis-fire on 2nd cylinder. Found that the plug wire was not fitting correctly. Re-set, but it came coming off. Due to age and not sure of how old plugs or wires were decided to change out. All plugs and wires were replaced with new ones. The old plugs were set at a gap of.045, yet the specs called for.052-.056. New plugs were set to specs. Codes were cleared.
But then began to experience the engine dying every time the vehicle was put into park. No new codes issued. This behavior was not consistent, as the dying occurred at certain runs and then would not occur at all. Has happen with air on, then with air off. Has happen when decreasing speed to a stop light.
Pulled plugs again and reset the gap to the original setting thinking that maybe there was a connection. But the problem still exists and no new codes have been issued.
Wanting to find a direction to fix the problem. Currently at a lost due to the inconsistent behavior.
Sometimes it does not happen at all and will not die, then shut vehicle down and restart it, it will start up but quickly stagger and die. You can force it to maintain by pressing the brake and gas and jump shifting to drive. Then other times it starts up, runs fine never showing a sign of issues.
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Sacredwolf
June 1, 2012.



I HAVE BEEN TRYING TO DO WHAT WAS IN THE FIRST ANSWER, but lacking tools and time, I am taking the vehicle to a mechanic to have it tested. Hence the reason for my further inquiry, as needed to know what more could cause this issue prior to some shady mechanic painting some horrid picture costing hundreds. Just trying to get as much information as possible. No expectations of a magic wand, but just testing the fuel pressure does not explain to me a direct possible cause. Does it? I have no clue, which is the reason I came here to ask and learn! Once I have it tested I will follow up with a response.

Tiny
Sacredwolf
Jun 5, 2012.
If you don't get the correct fuelpressure the injectors dont' ork right causing a very lean condition, hence a misfire.

Hmac300
Jun 5, 2012.
Car's fuel pressure checked ok. The vehicle was also hooked up to a scanner and everything tested out fine there too. The vehicle is still staggering and stalling out when put into park, or upon shutting it own and restarting it. Idle at time when it starts up and does not stall out appears to be rough but once in drive and driven levels out. I would appreciate direction from this point. What is the next thing to determine the cause?

Tiny
Sacredwolf
Jun 6, 2012.
Two things that I can think of and I can't think of much else unless ican actually look at it and a local pro would be better at that than i. Try cleaning your throttle plate on both sides with choke cleaner, they get gunked up and cause idle problems. Check to see if you have any vacuum hoses or any rubber connection that has holes in it or are not connected. One other thing trycleaning maf sensor with choke cleaner as well and make sure no duct work between maf and throttle plate has holes in it and is connected as well. Other than thta I cna't think of anything else.

Hmac300
Jun 6, 2012.
I cleaned the throttle plate and the sensor. All seemed in good shape really. I checked the vacuum lines and all seemed in good shape as well. I also on a hunch and dumped in a large amount of injector cleaner on the last fill up. Currently the problem is intermittent, But goes for long stretches without any issues. Going to periodically add a little injector cleaner to the system and then check the throttle body and sensor as the summer continues to see if there is anything else that pops up. Thanks for the insight and thoughts.

Tiny
Sacredwolf
Jul 9, 2012.
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