I recently changed my cap.and since I've changed it my tach doesn't want to work. My engine is dpfi and the cap was from a mpfi. Does it matter? The look similar. But the outside has differences? Anybody know? Thanx

 

Does the blue wire going to your distributor have any breaks in it?

 

ill check...where are some good places to look

 

Just look at the connector on the dizzy and see if anything happens. Is the car running correctly other than the tach not working?

 

yea i runs good except i get a code 20 after driving for a few mins and when i start it, it misfires a lil bit until its warm but maybe the code 20(i think its a eletrical load detector?) could be effecting it?

 

It might effect it. Check the Fuse under the hood make sure it wasnt blown, then if all else fails iv seen that replacing the whole underhood fusebox gets rid of the ELD code.

 

20 a code 16 and a code 1 I tried to erase those codes and as soon as I do the code 20 comes up then both the 16 and the 1. Comes up . Ma head is just hurting over this lol ill replace the under hood. Box and see what happens

 

also, check the fuse box under the steering column. should be fuse 15(7.5A), alt.

 

Allright ill chec that in the mornin thanx

 

Still not workn I kant see wat else it could be? Could it be the cluster?

 

Ttt

 

Why did you replace the cap in the first place?
Re-install the original cap, and see if it makes a difference.

 

The cap was bad and I had a d16a1 dizzy cap layin around didn't think anything of it so I used it
Ill get another cap and see what's up

 

I had a code 16 when my main relay was bad

 

 

changed relay and code 16 is gone. i have no codes now. jus the tach doesnt work anymore

 

check your speedo cable, mine broke and popped up code 20 + 17(?) one is ELD and the other is VSs

 

i have a 90-91 si cluster if your interested.