I think I have a choke problem on my 89 camaro with the 2.8 liter V-6. It runs super rough cutting in and out until it reaches a certain temperature, which can take 15 minutes or more of driving in cold weather. I can work on any carberated car but with this throttle body fuel inj. I am clueless as to what to do. I don't even know where the choke is. Can anyone help or suggest anything? Thanks

mike loshbough

• 1011 Answers
• Posted on Mar 04, 2009

SOURCE: 1999 S10 Blazer 2WD 4.3L V6. Starts hard, idles rough.

you have a single injector under the intake plenum it has 6 branching fuel leads off of this.A very common problem is the regulator attached to this and it leak off fuel which falls into the intake .causing this problem. it needs to be replaced .i have done at least 80 of these in my career.this will fix your problem.thanks for choosing fix ya

SOURCE: 82 corvette crossfire injection, engine

Please go to the crossfire injection forum to get some straight answers to the 82 corvette CFI system and how to troubleshoot it properly. There's a lot of misinformation given here, so much so, I don't know where to begin.

One thing is, the 82 corvette CFI does NOT have a MassAir Flow sensor system, it uses MAP and O2 mostly. The CTS sends a signal to the ECM telling it what the temp of the motor is and in turn the ECM controls the amount of fuel being dumped. On the older (orignal) CTS sensors, they have one wire and takes its ground from the threads. If any coorosion takes place, usually the CTS will report a cold engine and request lots of fuel.

To repair this issue, install one of the newer style CTS sensors that have two wires, one for signal and the other is ground.

Fuel pressure and vacuum leaks on any CFI motor play key roles. Set the FP to 14-15psi measured inbetween the TBs. The regulator is located on the rear TB and must be slightly moded to make it adjustable and can be done in a few minutes.

SOURCE: 5.3 chevy hesitates when cold runs fine after warming up

I have same problem, Chevy told me it was probably a seal affecting fuel air ratio and when warm seal expanded to stop air leak. I forget which seal but they also said to check plastic case around seal because it will warp and may also need to be replaced. It was located near top center of engine. Please let me know if you figure it out.

SOURCE: need firing order diagram for 89 chevy camaro 5.7

firing order is 1,8,4,3,6,5,7,2. The distributor turns clockwise. the #1 cylinder is Left front . left side is 1 3 5 7 and the passenger side is 2 4 6 8