Q: Tbi problems

asked by on August 16, 2016

My son recently hooked the battery up backwards. Luckily, i yanked it out of the vehicle before the fire would've started. Now... the tbi isn't receiving any fuel. New pump, sending unit, relay, lines, and ecm. Have spark, pressure at the throttle body, and fuses are good. Injectors refuse to spray. Why? I NEED this truck to work. NOW.
My car has a manual transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How Does the Oil Lubrication Process Work in the Engine?
The lubrication system in an automotive engine (https://www.yourmechanic.com/article/how-a-modern-engine-works) is vital to having a long-lasting engine with normal operating temperatures and metal wear. The lubrication will flow between all the rotating metal components to reduce wear and heat-related damage from friction...
Overheating after brake modulator replacement
Hello there, there are a few things may have happened to cause your 2000 Cadillac Catera to overheat. The most common would be a radiator cap failure, air in the cooling system, or the wrong type of coolant. A qualified...
New alternator is loose
The alternator locking sleeves should be moved all the way away from pulley side before installation. Also, check the mounting bosses and make sure they are the same thickness. If you'd like some assistance with this, consider YourMechanic, as a...
Steaming of the engine
Hi, thanks for writing in. Codes P0107 (https://www.yourmechanic.com/article/-p0107-obd-ii-trouble-code-manifold-air-pressure-map-barometric-pressure-sensor-circuit-low-voltage-input-problem-by-john-nelson) and P0122 (https://www.yourmechanic.com/article/p0122-obd-ii-trouble-code-throttle-pedal-position-sensor-switch-tps-a-circuit-low-input-by-jay-safford) could show up for several reasons, such as a faulty mass air flow sensor (https://www.yourmechanic.com/article/symptoms-of-a-bad-or-failing-mass-airflow-sensor). If you would like help, consider having an expert automotive technician from YourMechanic come...
Does my catalytic converter have a sensor?
Hello, thanks for writing in. You do have a catalyst O2 sensor. The failure of the 15psi test is most likely the catalyst is clogged causing the excessive exhaust back pressure. The catalyst should be replaced if it exceeds the...
no heater
The lines to the firewall could be hot and yet the heater control valve (https://www.yourmechanic.com/services/heater-control-valve-replacement) is not admitting the heated coolant to the heater core in the dash. So, you want to inspect that valve and make sure it is...
car turns over several times before starting.
The problem depending on vehicle sounds like you are losing fuel pressure when you turn off engine. It may have a bad fuel pump or pressure regulator. Have pressure tested to see if it holds pressure after turning off engine?...
High pitch squealing while accelerating. New water and power steering pump
Hi Brandon. Thanks for contacting us tonight. A squealing noise is typically caused by a loose belt - like a serpentine belt that drives the water pump on your Pontiac. It's also possible that one of the pulley's is causing...
Replaced front suspension got aligned new tires , steering shudders at low turning speed still chevy silverado 2004 1500
Hi Houston. Thanks for contacting us today. Sometimes when multiple components are replaced, and adjustments made, it will highlight other parts that were not replaced that might be loose or wearing out. Based on what you've indicated in your question,...

Related articles

2012 Toyota Camry vs. 2012 Chevrolet Malibu: Which One Should I Buy?
Mid-size sedans are the perfect family vehicle; offering just enough space for you and a few kids, but not so much that a small family will feel lost in them. This class of vehicles is slightly larger than a compact...
The Best Used Cars to Buy If You’re an Electrician
As As an electrician, you have to haul around wiring, tools and equipment, and tons of supplies. You can’t get by with a small used car, or even a big one. What you probably need is a good used cargo...
Symptoms of a Bad or Failing Auxiliary Battery
If you have multiple batteries in your vehicle, you may have to replace one if the vehicle won't crank, fluid is leaking, or the Battery Light is on.