Strange engine activity?

Topic: Strange engine activity? (Read 3225 times) previous topic - next topic

Strange engine activity?

Reply #15 – October 15, 2009, 01:45:03 AM

Quote from: mcb82gt;294809

Ummmm.....:burnout:

i'm rough on my car....

c4 with a full manual transbrake valvebody will be going in soon......

Strange engine activity?

Reply #16 – October 15, 2009, 09:52:50 PM

So i ran that test and it came up with code 22 for KOEO and CM.

Peace,
Dan W.

Strange engine activity?

Reply #17 – October 16, 2009, 12:11:09 AM

Quote from: Roehm;294980

So i ran that test and it came up with code 22 for KOEO and CM.

Peace,
Dan W.

MAP sensor frequency out of specs.

Strange engine activity?

Reply #18 – October 16, 2009, 12:24:35 AM

So you guys think I should replace it? Tomorrow I'm gonna try a KOER test.

Strange engine activity?

Reply #19 – October 16, 2009, 09:21:33 AM

Yep now that you've verified it has a MAP sensor related code you can repl it...

Strange engine activity?

Reply #20 – October 16, 2009, 11:52:24 AM

Quote from: Roehm;294998

So you guys think I should replace it? Tomorrow I'm gonna try a KOER test.

Just make sure the car is warmed up first otherwise you may get some false codes.

Strange engine activity?

Reply #21 – October 16, 2009, 12:30:56 PM

I ran the codes not too long after I got home from work so the car was plenty warm. I'll be sure to go over my vacuum lines one more time and then go grab that sensor. Thank for the help guys, if anything else comes up I'll be sure to let you know.

Peace,
Dan W.

Strange engine activity?

Reply #22 – October 16, 2009, 04:07:34 PM

I still think it could be the MAP sensor vacuum hose. I would just get a new one and try sticking it onto the air ride nipple on the vacuum tree, then run it again to see what happends. If you do this, plug up the hose that was on the map sensor, then get it warm and try the codes again.

Strange engine activity?

Reply #23 – October 16, 2009, 05:24:30 PM

I actually just ran the KOER test just a little bit ago and it threw codes 94, 44 and 33. All of which are related to emissions and I don't imagine they would be causing me the problems I am having. The vacuum line running from the MAP to the manifold was replaced by my father. I double checked it again and it looked fine. I'll gladly try your suggestion later to see what happens but I really think its the sensor. The only thing the car does when its unplugged it idle down a little. It doesn't really run any differently.

Peace,
Dan W.

Strange engine activity?

Reply #24 – October 16, 2009, 05:25:35 PM

You can yank out all the vac hoses and toss em into the street, it won't cause a KOEO for the MAP sensor...

Strange engine activity?

Reply #25 – October 16, 2009, 09:53:58 PM

And on that note, I'll go grab a new MAP sensor tomorrow. Thanks TurboCoupe.

Peace,
Dan W.

Strange engine activity?

Reply #26 – October 17, 2009, 10:43:21 PM

Got the MAP sensor installed and messed with the timing and bit. Man that thing really runs now. No hesitation or anything, it just goes when you give it gas. Thanks a million guys.

Peace,
Dan W.

Strange engine activity?

Reply #27 – October 27, 2009, 05:37:29 PM

Ok I'm bring this thread back ya'll. After driving that car around for a while with the timing advanced a bit, it did run better but still occasionally misses. We had some last minute adjustments to the Cougar over the weekend and set the timing back a bit to get the idle down. Now the hesitation is back just like before, still coming and going as it pleases. Just took the time to triple check all of the vacuum lines and they are all great. Replaces the PCV valve and looked over my electrical connects. So as I stand...I'm stumped. I can't explain the miss or hesitation. Even if I advance the timing it will increase the idle but a slight miss still rears its ugly head. Any thoughts? Maybe a sticking fuel pressure regulator? another electrical problem perhaps?

Peace,
Dan W.

Strange engine activity?

Reply #28 – October 27, 2009, 07:05:05 PM

Check your EGR valve for crud. Might be sticking open.

Strange engine activity?

Reply #29 – October 27, 2009, 07:26:31 PM

EGR is actually not hooked up. It was my fathers doing, not my choice. I think the only thing not hooked up is the vacuum line going to the top of it. All the electrics are plugged in. I've been wondering if that was going to cause a problem.

Peace,
Dan W.