my 3800rpm hesitation has stopped if you have this problem you need to do this

 

I posted this earlier today - same problem:

At around 3800 the ECU is switching on the secondary injectors & cutting back half on the primaries.
This works smoothly only if your grounds are perfect.

It usually goes like this:
1) The primary ground (battery to starter) gets old.
2) some load picks up the firewall to bell housing ground (which is just a cheesy clip) & it gets weak.
3) Now the sensor & control grounds start seeing alternator & spark noise.
4) The ECU goes nuts.
5) You go nuts.

Clean up your grounds (bright shiny metal to metal contact).
Then maybe add a ground from the alternator frame to the spark coil mount.

Drive & smile!

 

What part of the ECU did you run your ground wire off of? Any pics?

PLEASE PM ME!!!!!!!!!!!

Thanks

 

i,m sorry i didn't take any picks. but i used a 10 gauge wire to ground the chassis of the ecu to a remote point that was not under the carpet. and i used a diagram off uf 1300.com to find out which wire to ground off of the middle plug.if i remenber right its the black wire at the top right of the middle plug. i grounded this wire with a piece of 14ga. keep it clean. if i have time i will tear my car apart and take some pics.

 

What year car was this on?? Just curious.. I was reading through old posts and REted stated that the grounding problem was fixed in production after 1987 1/2 year.
I never had the 3800 hesiation on my 90, but I did have high rpm breakup that was fixed by the grounding.

 

88n/a

 

I have this too.. thought it was problems with my 6ports (which its not) so hopefully this will solve it

Something I've been meaning to do anyways.