Top 20 1991 Chevrolet Camaro Questions & Answers

Question edited for clarity. Question moved to model category. Diagrams in the link https://www.google.com/search?q=1991+Chevy+Camaro+RS+V8.+I+need+vacuum+line+schematic ..

I'm GUESSING... fuel pressure regulator<?>.

The ignition module is not getting power or ground one . The module can be good and if not getting power or ground can not work correctly .

i would see if coil is crack even a hair line crack can cause hesitating under load if you cant see a crack wait till dark and look at it

The ecm fuse also powers the pass-key module on the key barrel. See diagrams below. I recommend you probe the starter enable relay socket to see if it is getting the ground signal from the pass-key decoder whole someone tries to start the car.

what's wrong with my car? You looking for a magical fix ? There are none ! Testing using electric test equipment an check the fuel pressure an flow with the proper tools , also hooking up an obd1 scan tool an checking sensor data . Are you familiar with obd1 ? Electronic fuel injection an all the sensors involved ? mass air flow , crankshaft postion , Cam position , MAP sensor , engine coolant temp. sensors , Ignition control module . Any one of these being bad could be the cause . Are you willing to replace all of these till you fix it . Do yourself a favor an take your vehicle to a qualified repair shop , because without testing all you'll get here is guessing without testing .

whatever you did to them when you switched the motor because you didnt need to touch those

My info says upper engine, center, close to water outlet, for the coolant temp sensor. If your not sure look up wiring diagram for that sensor, note the wire colors. Autozone.com has free wiring diagrams as well as bbbind.com

I would get the alternator checked to make sure it has good voltage. It might be too weak to recharge the battery while running. The other issue could be a bad voltage regulator.

Possible neutral safety switch failed if its an automatic, or inhibitor switch if standard trans. Does it have an alarm ? Did you get the ign switch in properly, if its the style that mounts down low on the column,loosen the screws and slide it back toward steering wheel and recheck for start

as it is the basic 305 block the differences may be fuel injection over carburettor which may require sensor attachments but basically the engine should just slot in place.

ignition switch shouldn't be the cause of your overheating problems you verify the radiator fan motor is working by jumping the 2 terminals to the battery?

I doubt it's the pump. The only reason I have ever replaced pumps are on engine rebuilds or someone wanted a high pressure pump. Since you have good pressure, then no pressure until the RPM's are up. I would say the crank bearings are a bit worn. Going to zero pressure means something is not getting enough oil. Just a note... If there is a lot of sludge, some port could be clogged. But this also leads to a total engine rebuild, not just the crank and bearings.

I don't know about the older panels, but on newer ones, remove the IP, turn it clockwise and let the needle come around to 0 Plug it back in and check before you reassemble. if it doesn't work replace the TAC electric motor.

Get some experienced help or it will be a disaster.

Get a wiring diagram Study it to learn the system you going to work on

What,s the question???

Headlight relay 91 camaro atop pass side fender Dr next to Firewall.

Spark or fuel. Start with spark. There are inexpensive little test lights that will let you know if you're getting spark. If you have spark, start looking for a problem in your fuel system. Do you hear the pump kick on when you turn on the key before you start cranking? Is its air choked off? In line fuel filter that could be clogged? Fuel pressure? Injectors firing? Start with the easy stuff and rule out possibilities one-by-one until you find what's keeping the engine from getting spark, air, or gas.

I take that it does crank over? If this is the case you need to determine where the problem is, are you getting fire to the spark plugs? or is fuel not getting to the engine. If you know you have fuel pressure to the fuel rail, and the pump is running when you are trying to crank the engine, make sure that the injectors are spraying fuel into the engine. If you have verified that you do have fuel and it is getting into the engine, make sure you have spark to the plugs. It could be the pickup in the bottom of the distributor, this is what fires the coil and meters the injectors.