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The speedo is of course electronic, it either has a defective circuit board or the tiny motor that moves the needle is defective. You will need to remove the cluster from the car and send it out to a factory repair center.
I have the same issue on a 94 B250 - replaced ECM, cam and crank sensors - still only coil primary with initial relay cycle, then nothing during crank. Was told ECM needs signal from cam and crank to send primary to coil. Very confusing - all wires connected.
have checked the play in the distributor shaft gear . excessive play can cause a timing problem for a moment. also has the service engine soon light came on with a code 42 for the ignition system. ignition control module can cause this concern also.
The easiest way is to follow the top radiator hose to the motor. Its at the end of the hose ti the aluminum housing. There may be some other hoses coming off the same housing. for one thing it isn't easy to get to. good luck.
Sounds like the fuel filter. It would indicate the correct pressure at idle or maybe even revving. Once the engine is put under a load (highway speeds) it begins to choke. Try replacing the fuel filter.
The timing belt has broken. Fortunately though, according to my catalog, this is not an interference engine and the engine should not be damaged internally.
If the engine seized the issue is most likely beyond the scope of the DIYer and shoult be taken to a shop for diagnosis. You will most likely need to rebuild the engine, or buy a rebuilt/new engine.
Most likely, you have either a bad center air-bag computer, or contamination on the wiring connections of the center air bag computer.
This unit resides under the center console, behind the shifter. If beverages spill in this area, the wire connector could get compromised, and stop the computer from working properly. Toyota has issued a recall regarding this issue, you best bet is to contact a dealer, and have it checked out.
Try checking for vavuum leaks. Possibly at the PCV valve. Had a friend whose 94 grand am 2.3 did the same thing... had two or three vacuum leaks and one of them was a totally shredded PCV hose. Hope this helps!
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