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Dan
Dan, Technician
Category: Buick
Satisfied Customers: 23591
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Need location of manifold absolute pressure. On 95 riviera.

Customer Question

Need location of manifold absolute pressure. On 95 riviera. Super charged 3.8
Submitted: 1 year ago.
Category: Buick
Expert:  Dan replied 1 year ago.
Hello, my name is***** is no map sensor, only a maf sensor. What is the problem your having? Thanks.
Customer: replied 1 year ago.
Sputters above 60 mph. Horrible gas mileage all around.
Expert:  Dan replied 1 year ago.
Does check engine light come on or flash? Has anything been replaced yet? Thanks.
Customer: replied 1 year ago.
Full tank. No light. 3/4 & below light is solid. Replaced fuel pump. Intake manifold gasket. Coils. Fuel filter.
Expert:  Dan replied 1 year ago.
3/4 below what? And what light comes on solid?
Customer: replied 1 year ago.
3/4 of a tank of gas then the check engine light comes on solid. When the gas tank is full the check engine is not on. More worried about the bad gas mileage.
Expert:  Dan replied 1 year ago.
What code sets when tank is low?
Customer: replied 1 year ago.
Mechanic said code says running lean. I do not know the code number. The exhaust doesn't smell right at all.
Expert:  Dan replied 1 year ago.
I would start by replacing fuel filter and if that doesn't help I'd monitor fuel pressure to see if it is low during problem, if so replace fuel pump. A weak fuel pump could cause poor mileage, lean codes, and loss of power at higher speeds. Fuel pressure should be around 41 psi, let me know if you have more questions. Thanks.