horrible performance
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
horrible performance
Been messing with my 97 for sometime now with maybe some luck. When you hit the gas it takes from idle to 2000 rpm's about 8 seconds. From 2000 to red line about 1 sec, like u flipped a switch. Been through all kinds of stuff and the only thing I come up with is the map. Unplugged she screams and runs like it always had. So I bought a new map and it runs exactly like it did with the old map. I now have a AE if some body has any ideas for me to check. Thanks.
Laughing Gas
Joined: Feb 2010
Posts: 859
Likes: 2
From: Port Orchard, WA
If it ran better with the MAP unplugged, then you replaced the MAP and there was no change, I would suspect an intake/exhaust leak.
Hook up AE and tell us what the KOEO, idle, and WOT readings for the MAP are.
Hook up AE and tell us what the KOEO, idle, and WOT readings for the MAP are.
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
I checked the map line and its not cracked or plugged. What AE drop down do I need to watch the map. Seems like there was a few different ones for map sensor. Thanks. I'm building a leak detector to try that this weekend..
Laughing Gas
Joined: Feb 2010
Posts: 859
Likes: 2
From: Port Orchard, WA
I'm not familiar with AE because I've never used it. But the MAP sensor only outputs one value, which is in the form of varying voltage or frequency depending on what year your truck is. The computer then changes that to a pressure reading. Depending on the software, it will either output a gauge pressure or absolute pressure. Gauge pressure is absolute pressure with ambient pressure subtracted, i.e., what your boost gauge would read.
Just give us either value, it will be obvious what we're looking at.
Just give us either value, it will be obvious what we're looking at.
Thread
Thread Starter
Forum
Replies
Last Post
mr.fordneck
1987 - 1996 F150 & Larger F-Series Trucks
4
Oct 20, 2012 10:49 AM
viperrtblck
1994.5 - 1997 7.3L Power Stroke Diesel
6
Aug 8, 2006 12:21 PM
Catsby
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Sep 5, 2004 09:29 AM
