Haltech horrible hesitations/jerking. rpm based. e6k
04-10-05, 11:33 PM
#1
horrible hesitations/jerking. rpm based. e6k
at two spots in the rpm range, the tach will jump down and back up when i'm accelerating. its kinda like the CAS isnt reading anything for a split second. this only happens at two spots in the rpm range; between 2500-3000 and between 4500-5000. its kinda of strange and no variables (like throttle position, vacuum, boost, etc.) seem to change it.
can anyone offer any help?
can anyone offer any help?
04-11-05, 01:47 AM
#2
EFI Tech Wannabe
iTrader: (1)
Join Date: Sep 2003
Location: D.R., USA, the world...
Posts: 2,405
Likes: 0
Received 4 Likes
on
4 Posts
Have you tried a datalog to see if there is anything funky happening? like an RPM spike, or an abnormal injector duty % or even a hickup in the ignition timing? ive sometimes run into faulty grounds on the coils, or even bad plugs or plug wires that have caused behaviours like this.
04-11-05, 11:43 PM
#5
Open up! Search Warrant!
Join Date: May 2002
Location: Kicking down doors in a neighborhood near you
Posts: 3,838
Likes: 0
Received 2 Likes
on
2 Posts
With the CAS wire shielding not being grounded, wouldn't the problem be more consistent? It seems like the condition for interference would exist all the time with the shielding not grounded. I don't know, maybe I'm thinking about it wrong.
04-11-05, 11:50 PM
#7
The mystery of the prize.
The sheilding is grounded @ one end inside the harness, you don't ground it at both ends.
Does the engine falter when this is happening?
If you hold the RPM's right at that range where it happens with no load in neutral, will it constantly do it? Ignition settings correct? offset/teeth count etc?
Does the engine falter when this is happening?
If you hold the RPM's right at that range where it happens with no load in neutral, will it constantly do it? Ignition settings correct? offset/teeth count etc?
Trending Topics
04-12-05, 12:10 AM
#9
The mystery of the prize.
you arent supposed to ground it @ the CAS, the sheilding gets grounded to the rest of the grounds in hte harness, you can confirm this by checking continuity with a multimeter between the sheilding @ the CAS end of the harness and the ground of the car. If theres no continuity then maybe there is a harness issue and it's not grounded properly, if there is continuity it's grounded and the problem is somewhere else.
You didnt have this problem before with the last motor, so look at what has been changed since then, go back over everything.
You didnt have this problem before with the last motor, so look at what has been changed since then, go back over everything.
04-12-05, 01:58 PM
#12
EFI Tech Wannabe
iTrader: (1)
Join Date: Sep 2003
Location: D.R., USA, the world...
Posts: 2,405
Likes: 0
Received 4 Likes
on
4 Posts
Guys, the additional ground wire on the haltech harness with the round terminal is precisely the shield gound for the entire harness, this ground is only done at the ECU side of the harness, dont ground any of the shields at the connectors/sensor's end.
If you do additional shielding, make sure its grounded on the ECU side only.
If you do additional shielding, make sure its grounded on the ECU side only.
04-13-05, 02:02 AM
#15
i just got back from grounding the CAS shielding. no avail.
need more ideas
also double checked the wiring to the CAS, all colors are correct:
HALTECH: CAS:
yellow-----------> red
green-----------> green
red--------------> white
blue-------------> white/black
need more ideas
also double checked the wiring to the CAS, all colors are correct:
HALTECH: CAS:
yellow-----------> red
green-----------> green
red--------------> white
blue-------------> white/black
Last edited by jacobcartmill; 04-13-05 at 02:29 AM.
04-13-05, 08:37 PM
#19
The mystery of the prize.
have you tried a different cas? confirmed good connections on all the cas wires? I know you checked that the colors were all going to the right place, what about the quality of the connection?
It sounds to me like it might be interference, did you rewire the haltech? Where is the CAS bundle being routed? near the ignition wires or anything else you can imagine being problematic? Can you try routing it differently?
It sounds to me like it might be interference, did you rewire the haltech? Where is the CAS bundle being routed? near the ignition wires or anything else you can imagine being problematic? Can you try routing it differently?
04-14-05, 10:47 AM
#21
Senior Member
iTrader: (1)
Join Date: Nov 2002
Location: Des Moines, Iowa
Posts: 299
Likes: 0
Received 0 Likes
on
0 Posts
Sounds somewhat similar to my problem. Just sent my e6x in to see if that was the problem and it checked out okay, so thats..not it. My problem, however, is that it just doesn't want to pick up rpm's at all. Let us know what you find out.
04-14-05, 01:15 PM
#22
Locust of the apocalypse
Join Date: Apr 2003
Location: Directly above the center of the earth (York, PA)
Posts: 2,553
Likes: 0
Received 1 Like
on
1 Post
Where are your CAS lead wires routed??? Do they run along the spark plug wires? Ignition Wires? Alternator Charging lead?
Where exactly do you have the haltech grounded to, and what else is grounded on that point?????
Where exactly do you have the haltech grounded to, and what else is grounded on that point?????