1991 flooding problem

VERN1939

MEMBER
1991 PONTIAC SUNBIRD
4 CYL
FWD
AUTOMATIC
200,000 MILES

Here is my new post, thanks JDL, dealer was hostile and said "my people wont know anything about a car thats old as yours". So I left.

i'll do an ohm on injector. One on top of tb.
new tbfuel sensor, get 6v on one of 3 terminals (prev post)

looking for diagramof engine now thanks

vern 1939

5 Replies

JDL

MECHANIC
16,098 POSTS

If I call a dealer for some reason, I ask for the service department. Sometimes they are very helpful. Sometimes, they don't have time to fool with me. I sent you a message, engine component location, did you receive? You have to click on your log-in name to see your messages.

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Tuesday, November 23rd, 2010 AT 3:13 PM

VERN1939

MEMBER
15 POSTS

Hi JDL,

I still have raw fuel flooding my throttle body when I turn ont he keyk.

I took the throttle (carb) off, cleaned everything, new injector (12v when key turned on) new throttle body fuel pressure sensor (aattached to butterfly valve in throat of carb).

Turned on key, you can hear the gas pump in the tank building up pressure. During the run time of the pump, thats when I get my flood of gas.
While cleaning the carb. There is a 4 poing plug on the rear of the assembly next to the firewall. That controls a spring loaded rod with an arrow head shaped end on it. What does that do?

I did not get voltage from any of the 4 wire ends when I tested it. Does that have to do with gas pressure? If it does and is not functioning then willit flood the carb.

Would it allow loss of fuel pressure while sitting and thus have to "catch" up on pressure before starting the engine?

Could that be my gas imput problem?

Thanks

Vern

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Saturday, November 27th, 2010 AT 3:54 PM

JDL