On Mar 23, 4:55 pm, Joe Kultgen <jkult... (AT) tds (DOT) not> wrote:
looks like it... it's crimped together.

I'll check tomorrow. seems like plenty of pressure in the system..

Ok.. still great spark, at right time.

While cranking, (applying +12 to START on ECU) I get 0 to 2v at
injector with analog meter (could be slow response of meter giving
false reading)

Injector:
1) +12, -12 to it, and I get a good spray of fuel
2) no continuity between injector and case... it's insulated
properly
3) testing at ECU connector, on injector power supply pins, I get
1.7 ohms resistance. This is the same resistance of the injector
itself, and is within acceptable range according to the service manual
4) testing across injector, with injector in circuit with ECU,
cranking engine, START = 12v, I get 2volts/0volts oscillating

Is 2volts enough power for injector? I don't think so.

I get code 5 when I reset the computer... from what I read, this is
specification code

after cranking, I get code 14, "injector- abnormal output"

so it looks like ECU isn't supplying enough voltage.

I opened the box and find the transistor that controls this signal..
perhaps it is bad, or the bias resistor(s) is(are) damaged (I play
electronics)


Any ideas?

Rich

On Mar 24, 1:32 am, aiiad... (AT) gmail (DOT) com wrote:
This is 91 loyale SPFI ECU, manifold, MAF

but I have an 87 Fuel Pump...

Rich

aiiadict (AT) gmail (DOT) com wrote in news:1174725269.321004.89760
@y80g2000hsf.googlegroups.com:

Different year on the fuel pump should't be a problem as long as you're
certain it's a fuel injection pump. The FI pumps are cylindrical and
deliver around 35-50 psi, carb pumps are rectangular and put out around
3-5 psi.

According to the flow chart in my FSM you should check for open circuit
on terminals 43 and 48 of the ECU and replace the unit if bad. The fact
that it's putting out *some* voltage would lead me to look for a bad
solder joint where those terminals hit the circuit board.

The other posibility is that you fried it during your test hook up. The
body of the ECU must be solidly grounded. A weak or intermittant ground
will cause these units to go TU.

Later,
Joe