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Hi there, The revised spark plugs are 41-110 and they are PREGAPPED AND SHOULD NOT BE CHANGED. Your 98 has had multiple spark plug design changes and also should have the PCM upgraded with the latest calibration from GM to optimize the spark plug change. Allthebest, c4c5

HI there, Start from square one, does your injector pulse occur ????? Even if you lose the oil pressure signal, the ignition firing will allow the injectors to pulse. UNLESS the ECM is not firing the injectors. Your injector pulse will tell you everything. Allthebest, c4c5

HI there, Nope, because GM gives a tolerance of 1.0 ohm from the baseline of 16.5 I would be looking at one thing, how does the vehicle run when ice cold and you start the vehicle? The first minute of run time would be the key. If it runs great then, but changes when it warms up, you have a...

HI there, The afterblow function is programmed into the HVAC control head, there isnt another module installed so be aware that you can turn it on or off by a programming feature. Second, I would be looking for ANY blockage at the AC drain. Usually, I recommend that they turn off the AC 2...

Hi there, The key is how the transmission shifts in S. You completely change the shifting of the transmission when you do this. Just because you are in S does NOT MEAN you have to use the paddles. Its just a different type of shifting. YOU MAY use the paddles in S but it is NOT required...

HI there, Does it do the same in "S" ???/ Allthebest, c4c5

Cruisefest pics are up! www.facebook.com/corvettepassion Its all there. Included in there was all the fun people who made this Cruisefest an excellent one!!!!! Thank you to every last one of you, :dancenaughty Allthebest, c4c5

HI there, If you follow the directions in the service manual for removal of the differential carrier assembly, you should NOT have any problems at all. Allthebest, c4c5

HI there, Just as a sidebar, I would suggest making sure that the battery terminals are correctly torqued with new bolts. If you have a bolt that is stripped, you will have these exact symptoms as the electrical connection comes and goes. This will wake up modules and create battery drain...

Hi there, Yes, you can remove the differential and service the output shaft seal from the transmission. However, a few points for you. #1, there was a seal revision because some of the older ones would take a set when the vehicle sat for an extended period of time. But once the vehicle was...

Hi there, Its called the brake transmission shift interlock solenoid. Some make more noise than others, but certainly normal. Allthebest, c4c5

Hi there, First, the prevelance of this condition is there. Second, there is NO SPECIFICATION for runout on the c5 or c6 harmonic balancer. Third, rubber isolated harmonic balancers are known to rotate at times in some applications. The AC belt is usually the first one to make noise as...

HI there, If the panel was replace, its most likely that the handles were replaced too. Please check your handles to see if they have ROLLERS in them. If they do, those handles need to be replaced. Then, you can proceed with diagnostics on the noise. GM has numerous revisions with a TSB...

Hi there, It will work, but the key is to NOT let the master cylinder go low on fluid. Once air is introduced at the master cylinder, its basically impossible to remove the air from the ABS control module without a Tech 2. Also, NOTE the bleeding procedure in the service manual as this is...

Hi there, The key is also WHICH suspension you have. If you have F55 or magnetic ride control, it will lean more than stock FE1 system. Allthebest, c4c5

HI there, #1, the Vanquish or Vanquish S were the only 2 Astons equipped with the T56. DB9 had an italian based six speed manual made by Graziano. As for the noise, because you have a torque tube that spins at all times where most others do NOT. #2, you might try to get your shifter...

No, you must be INSIDE 1" from the edge of the sidewall to tread point. Anything else will not work. Allthebest, c4c5

Hi there, Check to make sure your MAF sensor is completely connected to your engine. Also, have you run any Techron Plus through your fuel system recently or do you use TOPTIER fuels ???? Any modifications ????? Allthebest, c4c5

Hi there, Obviously, you have a fuel or air delivery issue. The reason it ONLY happens when you first start it is that your in open loop and the ECM is not looking at the fuel trims. Once you get to closed loop, the compensation of the fuel system takes over and your fine. I would wonder...

HI there, Take your part number from the unit on your car so that we may be able to match your correct EBTCM because there are 2. Allthebest, c4c5