Changes by last author:
Added:
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CURRENT 10/21/09, About to install new ecu #2593, this ecu has the 4.7UF 63V cap inside. |
| CURRENT 2009-09-23 |
| 2009-09-23 |
| '''Why are drivers still failing after replacing the injectors and harness? |
| Why are drivers still failing after replacing the injectors and harness? |
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'''The flyback connection is 100%, I replaced the wire with another new wire, 18 awg, wired it myself, about 2 or 3 failed FETS ago. The grounds were replaced/soldered before that.
Kevin 10/21/09''' |
| ** to blow FETs, something must be very wrong. Most likely the voltage goes beyond 60V (overheating the FETs with these injectors is basically impossible). Should have been made with irf640 to survive insufficient flyback connection. But it was made to normal standard. Please write in order note next time: use irf640 for injector FETs. With good flyback-connection the FETs should never see overvoltage. |
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** to blow FETs, something must be very wrong. Most likely the voltage goes beyond 60V (overheating the FETs with these injectors is basically impossible). Should have been made with irf640 to survive insufficient flyback connection.
***Flyback wire is 100% OK. I have checked and re-checked But it was made to normal standard. Please write in order note next time: use irf640 for injector FETs. With good flyback-connection the FETs should never see overvoltage. Are there any disadvantages to using irf640? If not, then why are they not the standard, if they are more durable? |
| Check Flyback wire, check grounds, all check OK. |
| Check Flyback wire, check grounds, all check OK. |
| Replace Flyback wire from 20 awg to 18 awg |
| Replace Flyback wire from 20 awg to 18 awg |
| Build new injector harness, flyback wire and relay near ecu - all good conections. |
| Build new injector harness, flyback wire and relay near ecu - all good conections. |