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GM Port Injection
In 1986 two relays replaced the MAFS module and the Electronic Control Module (ECM) was changed to a GM part #1227165. In 1989 the cold start injector was deleted from the system. The primary injectors were used for cold starts via a fuel enrichment program in the newer EPROM calibrators. In 1990 GM introduced the speed density system.
Hello All!! New member from Texas!!86 L98 Cold Start ...Had the exact same problem with my 87 and thought it might be the cold start injector too, i did everything you did, replaced the cap, rotor, plugs and wires and have been using injector cleaner every fill up for the last six months, today i decided to replace the ignition coil, only place that had it in stock was pepboys and that seemed to fix the problem, she starts right up soon as i turn ...
Tuned Port Injection QuestionsAlso the '85-88 used a ninth injector for cold start. The '89s used the same computer as '86-89 but fired all eight injectors for cold start like the '90-92s. 14.
1986 Corvette: Won''t start: turns over fine. but no fuel ...Hello, I am simply offering an assist. I do not wish to take any credit, however I believe that this wiring diagram may help you. 86 Corvette TPI. Pink and Black wires at injectors have 12 volts. Lt. Blue wires are toggled to ground via the ECM. There should be no power on the Lt Blue wires.
Symptoms of a Bad or Failing Cold Start Injector ...The cold start injector is there to enrich the fuel mixture of the vehicle during low temperature conditions, such as during cold starts or in cold weather. If the cold start injector fails or has any problems, it may not be able to supply the additional fuel required in cold conditions, and as result may cause the vehicle to experience difficulty starting .
C4 Fuel Injection Overview | CC Tech1985-1988 cars use a stand-alone cold-start system that requires intake manifold porting to allow cold start fuel flow. This porting hurts power output. 1989 cars had no cold-start system, along with intake manifold porting changes. The 1989 cold start event is handled by the PROM (chip). The fuel injector pulsewidth was increased.
1988 C4 corvette electrical wiring diagrams schematics ...When it's cold. the corvette cranks the motor, sometimes not ... but there is a wire that goes from the Neutral switch to the Cold start inyector and others, so I need the wiring diagram to ... I need 86 corvette engine and instrument panel wiring diagrams and I/P connector pinout diagrams, thanks . 65 Impala SS, 85 305 F body TPI engine ...